Title of Invention

METHOD AND APPARATUS FOR EVALUATING ANTI-CONTAMINATION LEVEL ON A SURFACE OF OPTICAL RECORDING MEDIUM

Abstract A method for evaluating an anti-contamination level on a surface of optical recording medium is disclosed. The method includes forming an artificial fingerprint on the surface by contacting a stamp (S200) having an artificial material adhered thereto on an optical recording medium, and measuring a symbol error rate (SER) of the formed artificial fingerprint, to determine a sensitivity of the fingerprint and determining whether the optical recording medium is of good quality or bad quality depending upon the measured SER.
Full Text METHOD AND APPARATUS FOR EVALUATING ANTI-CONTAMINATION
LEVEL ON A SURFACE OF OPTICAL RECORDLNG MEDIUM
Technical Field
The present invention relates to an optical recording medium such as an optical disc, and
more particularly, to a method for evaluating anti-contamination level on a surface of the
optical disc. Although the present invention is suitable for a wide scope of applications, it is
particularly suitable for quantizing the characteristic of a protective coating film being
formed on the surface of an optical disc, so as to enhance the stability thereof.
Background Art
Generally, an optical disc is used for recording information on the surface of the optical disc
by using laser beam. More specifically, the optical disc is a high-capacity data storage
means having audio, video, and text information converted to digital signals, then, a low
intensity laser beam is projected thereto so as to carry out a reading of the optical disc by
acknowledging the different intensities of the reflected light. Optical disc media include
compact discs (CDs), digital video discs (DVDs), laser discs (LDs), and so on. And,
recently, blu-ray discs (BDs) and advanced optical discs (AODs) have been in active and
competitive development as a standard for the next generation storage means.

The blue-ray disc has been under development to target the high definition video disc
recorder (HDVDR). The blu-ray disc is considered to be the next generation optical disc
storage means using a bluish-purple semiconductor laser (BFSL). Accordingly, the blu-ray
disc has a storage capacity of 27 gigabytes (GB), which corresponds to a 13-hour running
time of regular film and a two-hour running time of visual material having high definition
television (HDTV) picture quality. As described above, interest and focus on the blu-ray
disc as the next generation storage means that can compensate the shortcomings of the
conventional DVDs are elevating. However, due to the fine signal characteristics of the blu-
ray disc, quality deficiency resulting from scratches, deformities or formation deficiencies,
fingerprints, adhesion of impurities during fabrication process, and so on may occur.
Therefore, after the fabrication of the blu-ray disc is completed, a quality inspection process
is performed, and the inspected product is then shipped to the market.
Generally, the related art optical disc quality inspection process is performed by four (4)
measuring drives. Provided that a plurality of optical discs fabricated from the same
fabrication device all have the same characteristics, the manufacturer randomly selects an
optical disc and mounts the selected optical disc on the measuring system. The first
measuring drive measures high frequency signals and jitter from the optical disc. The
second measuring drive measures servo signals (i.e., focusing error signals and tracking error
signals) based on signals reproduced from the optical disc. The third measuring drive
detects the mechanical characteristics of the optical disc presently being under quality
inspection. Finally, the last (or fourth) measuring drive detects the optical characteristics of

the optical disc.
As described above, the related art optical disc quality inspection process consists of
inspecting the accuracy in information recording, the mechanical and optical characteristics
of the optical disc, and so on. Chemical and physical contamination, such as fingerprints,
mat may occur on an incident surface of a laser beam for recording/reproducing information,
during the usage of the high density optical disc, may result in a deterioration of optical disc
signals, damage in data, as well as incapacity of recording and/or reproducing information on
the disc. Therefore, in order to prevent such problems from occurring, a protective coating
film is formed on the surface of the disc, so as to enhance the level of anti-contamination or
surface stability, and the optical disc is inserted in a cartridge so as to protect the disc from
contamination. Recently, however, discs having only the protective coating film formed
thereon and no cartridges, in order to minimize the volume of the disc, have been introduced
to the market. Therefore, the quantization of anti-contamination of the protective coating
film formed on the surface of the disc has become an important factor for effective
fabrication and usage of a disc.
Nevertheless, a quantized method for evaluating anti-contamination occurring on the surface
of a high density optical disc has not been developed in the related art. In the related art, the
level of anti-contamination is evaluated solely by the personal judgment of an extensively
experienced manufacturer, whose judgment is based on observing the amount or level of an
actual fingerprint or a contaminant being adhered or smeared to the surface of the disc.
Therefore, when inspected through the above-described related art anti-contamination level

evaluation method, some misjudgment may occur and deficient discs that were subject to
such misjudgment may be shipped to the consumer market.
Disclosure of Invention
Accordingly, the present invention is directed to a method for evaluating an anti-
contamination level on a surface of the optical disc that substantially obviates one or more
problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a method for evaluating an anti-
contamination level on a surface of the optical disc that can quantize the characteristics of a
protective coating film formed to enhance stability of the surface of the optical disc.
Additional advantages, objects, and features of the invention will be set forth in part in the
description which follows and in part will become apparent to those having ordinary skill in
the art upon examination of the following or may be learned from practice of the invention.
The objectives and other advantages of the invention may be realized and attained by the
structure particularly pointed out in the written description and claims hereof as well as the
appended drawings.
To achieve these objects and other advantages and in accordance with the purpose of the
invention, as embothed and broadly described herein, a method for evaluating an anti-
contamination level on an optical recording medium includes forming an artificial fingerprint
on a surface of the optical recording medium by contacting a stamp having an artificial
material adhered thereto on an optical recording medium; and measuring a symbol error rate

[SER) in an area where the artificial fingerprint is formed, to determine a sensitivity for
fingerprint.
The artificial fingerprint material may be formed of at least any one of water, methanol,
sodium chloride (NaCl), urea, lactic acid, and violet dye. The stamp may be formed of
Si(Silicone)-rubber and may have a diameter of approximately 10 millimeters (mm). The
stamp may contact the disc with a pressure of 500 grams (g).
In another aspect of the present invention, a method for evaluating an anti-contamination
level on a surface of optical recording medium includes (a) contacting a stamp with
predetermined pressure on a stamp pad on which an artificial fingerprint material is formed
and adhering the artificial fingerprint material on the stamp; (b) contacting the stamp having
the artificial fingerprint material on a surface of optical recording medium to form an
artificial fingerprint on the surface; and (c) detennining a sensitivity of the fingerprint
depending upon a symbol error rate (SER) on the location where the artificial fingerprint is
formed.
In another aspect of the present invention, a method for evaluating an anti-contamination
level on a surface of optical recording medium further includes controlling a number of
contacting times of the stamp having the artificial stamp material adhered thereon from step
(a) to a dummy, according to a severe condition or a standard condition.
Herein, the stamp may be in a severe condition when the number of contacting times from the
stamp to the dummy is between 0 and 1, and the stamp may be in a standard condition when
the number of contacting times from the stamp to the dummy is between 2 and 4. When the

stamp is in a severe condition, the step (c) includes determining the optical recording medium
as being of good quality when the SER is less than 4.2×10-3, and determining the optical
recording medium as being of bad quality when the SER is more than or equal to 4.2×10-3.
On the other hand, when the stamp is in a standard condition, the step (c) includes
determining the optical recording medium as being of good quality when the SER is less than
1.5×10-3, and determining the optical recording emdhun as being of bad quality when the
SER is more than or equal to 1.5×10-3.
In a further aspect of the present invention, an optical recording medium is same kind of an
optical recording medium evaluated by the above method.
In a further aspect of the present invention, an apparatus for evaluating an anti-contamination
level on an optical recording medium includes a stamp for forming an artificial fingerprint on
a surface of the optical recording medium by contacting the stamp having an artificial
material adhered thereto on an optical recording medium; and a measuring unit for measuring
a symbol error rate (SER) in an area where the artificial fingerprint is formed, to determine a
sensitivity for fingerprint.
Herein, wherein the step (b) contacts the stamp on the surface of optical recording medium
until the artificial fingerprint being formed on the surface covers at least 50% of one long
distance code (LDC) block of the optical recording medium, the step (c) may include
determining the optical recording medium as being of good quality when the SER is less than
4.2×10-3, and determining the optical recording medium as being of bad quality when the


SER is more than or equal to 4.2× 10-3.
It is to be understood that both the foregoing general description and the following detailed
description of the present invention are exemplary and explanatory and are intended to
provide further explanation of the invention as claimed.
Brief Description of Accompanying Drawings
The accompanying drawings, which are included to provide a further understanding of the
invention and are incorporated in and constitute a part of this application, illustrate
embodiments of the invention and together with the description serve to explain the principle
of the invention. In the drawings:
FIGs. 1A to 1D illustrate process steps of a method for evaluating anti-contamination level on
a disc surface;
FIG. 2 illustrates a graph showing a symbol error rate (SER) in relation with a number of
times a stamp is being contacted to a dummy according to the present invention;
FIG. 3 illustrates a mediod for evaluating anti-contamination level on a disc surface
according to a first embodiment of the present invention; and
FIG. 4 illustrates a method for evaluating anti-contamination level on a disc surface
according to a second embodiment of the present invention.
Best Mode for Carrying Out the Invention
Reference will now be made in detail to the preferred embodiments of the present invention,

examples of which are illustrated in the accompanying drawings. Wherever possible, the
same reference numbers will be used throughout the drawings to refer to the same or like
parts.
FIGs. 1A to 1D illustrate process steps of a method for evaluating anti-contamination level on
a disc surface. Referring to FIG. 1A, a stamp 10 for forming an artificial fingerprint is
contacted to a stamp pad 30 at least once, the stamp having an artificial fingerprint material
formed thereon, thereby adhering the artificial fingerprint material to the stamp 10 being
contacted to the stamp pad 30. Subsequently, the stamp 10 having the artificial fingerprint
material 20a adhered thereto is contacted to a dummy at least once, as shown in FIG. 1B,
thereby preventing the artificial fingerprint material 20a from being excessively adhered to
the stamp 10. Depending upon the number of times the stamp 10 contacts the dummy 40,
the stamp 10 can be classified into a severe condition and a standard condition. The stamp
10 having contacted the dummy 40 for a predetermined number of times, as shown in FIG.
1C, then contacts a disc 50 having a protective coating film formed thereon, thereby adhering
an artificial fingerprint 20b on the surface of the disc 50. At this point, it is preferable that
the dummy is formed of a polycarbonate plate. Thereafter, referring to FIG. ID, a symbol
error rate (SER) of the artificial fingerprint (20b) formed on the surface of the disc 50 is
measured, thereby determining a sensitivity of the fingerprint or classifying the manufactured
disc into good quality and defective (or bad quality).
The SER is determined as the number of erroneous bytes in the related data block divided by
the total number of bytes in those data blocks. In Blu-ray system, the SER is determined as

FIG. 3 illustrates a method for evaluating anti-contamination level on a disc surface
according to a first embodiment of the present invention. Referring to FIG. 3, the stamp for
forming artificial fingerprints is contacted at least once on the stamp pad having the artificial
fingerprint material formed thereon, so as to adhere the artificial fingerprint material on the
stamp (S10). Herein, the artificial fingerprint material is formed of at least any one of water,
methanol, sodium chloride (NaCl), urea, lactic acid, and a very small amount of violet dye.
In addition, the stamp is formed of Si-Rubber, and it is preferable that the stamp having the
artificial fingerprint material adhered thereto has a diameter of about 10 millimeters (mm).
Then, the stamp having a pressure of 500 grams (g) is contacted to the stamp pad.
Subsequently, the stamp having the artificial fingerprint material formed thereon is contacted
at least once to the dummy (i.e., the polycarbonate plate), so as to prevent the artificial
fingerprint material from being excessively adhered to the stamp (S20 to S30). At this point,
the stamp also contacts the dummy with a pressure of 500 grams (g), and depending upon the
number of contacting times of the stamp to the dummy, the condition of the stamp is
classified into a severe condition and a standard condition. More specifically, when the
number of contacts is between 0 and 1, as shown in Table 1 below, the stamp is determined to
be in severe condition, and when the number of contacts is between 2 and 4, then, the stamp
is determined to be in standard condition. Such conditions are not limited to the number of
contacts described in Table 1 and can be varied by the inspector evaluating the anti-
contamination level on the disc surface.
Table 1


Therefore, upon evaluating the anti-contamination level on the disc surface, when the
condition of the stamp is set to the standard condition, the number of contact times from the
stamp to the dummy is increased to between 2 and 4 times, thereby setting the stamp to the
standard condition (S120). Subsequently, the stamp having contacted the dummy for a
predetermined number of times is contacted to the disc having the protective coating film
formed thereon for only one time with a pressure of 500 grams (g), thereby forming the
artificial fingerprint on the surface of the disc (S60). At this point, it is preferable to form
the dummy of a polycarbonate plate. Thereafter, the SER. of the artificial fingerprint formed
on the disc is measured, so as to determine the quality of the disc (i.e., either good or bad)
through an evaluation of me anti-contamination level (S70). Herein, the quality of the disc,
i.e., whether the disc is of good quality or of bad quality, varies depending upon whether the
stamp is in a severe condition or a standard condition (S80).
Depending upon the result from the above-described process (S80), and when the stamp
being presently used is in a severe condition, the disc is determined to be of good quality if
the SER value of the artificial fingerprint being formed on the surface of the disc is less than

4.2×10-3 (S100). On the other hand, the disc is detennmed to be of bad quality if the SER
value of the disc is more than or equal to 4.2×10-3 (S110). Furthermore, depending upon
the result from the above-described process (S80), and when the stamp being presently used
is in a standard condition, the disc is determined to be of good quality if the SER value of the
artificial fingerprint being formed on the surface of the disc is less than 1.5X10"3 (S140).
On the other hand, the disc is determined to be of bad quality if the SER value of the disc is
more than or equal to 1.5×10-3 (S150).
When the stamp is in a standard condition, the reference evaluation value is set to 1.5×10-3
because an error may occur during the process of determining the quality of the manufactured
disc if the reference evaluation value of the artificial fingerprint being formed once on the
surface of the disc, when the stamp is in a severe condition, and the reference evaluation
value of the artificial fingerprint being formed once on the surface of the disc, when the
stamp is in a standard condition, are set to be identical. Accordingly, by setting the
reference evaluation value in the standard condition to 1/3 of the reference evaluation value
in the severe condition, a similar anti-contamination evaluation level can be obtained.
Second embodiment
FIG. 4 illustrates a method for evaluating anti-contamination level on a disc surface
according to a second embodiment of the present invention. Referring to FIG. 4, the stamp
for forming artificial fingerprints is contacted at least once on the stamp pad having the
artificial fingerprint material formed thereon, so as to adhere the artificial fingerprint material
on the stamp (S200). Herein, the artificial fingerprint material is formed of at least any one

of water, methanol, sodium chloride (NaCl), urea, lactic acid, and a very small amount of
violet dye. In addition, the stamp is formed of Si-Rubber, and it is preferable that the stamp
having the artificial fingerprint material adhered thereto has a diameter of about 10
millimeters (mm). Then, the stamp having a pressure of 500 grams (g) is contacted to the
stamp pad.
Subsequently, the stamp having the artificial fingerprint material formed thereon is contacted
at least 2 times and not more than 4 times to the dummy (i.e., the polycarbonate plate), so as
to prevent the artificial fingerprint material from being excessively adhered to the stamp,
thereby forming a stamp in a standard condition (S210). At this point, the stamp also
contacts the dummy with a pressure of 500 grams (g). Then, the stamp having contacted the
dummy for a predetermined number of times is contacted to the disc having the protective
coating film formed thereon with a pressure of 500 grams (g), thereby forming the artificial
fingerprint on the surface of the disc (S230). Afterwards, the number of contacts from the
stamp to the surface of the disc is increased, so mat the artificial fingerprints formed on the
surface of the disc cover at least 50% of one long distance code (LDC) block of the disc.
Herein, the SER is increased (or elevated) as the number of artificial fingerprints within the
one LDC block increases. Accordingly, a sufficient number of artificial fingerprints should
be formed to cover at least 50% of one LDC block in order to evaluate an accurate anti-
contamination level. For example, when the disc has a radius of 40 millimeters (mm), the
artificial fingerprints that are formed in one LDC block on the disc should be formed at least
3 times with 1/4 of the circumference of the disc, in order to cover at least 50% of the one

LDC block. Subsequently, after measuring the SER value of the artificial fingerprint being
formed on the surface of the disc, the quality of the disc (i.e., either good or bad) is
determined through the evaluation of the anti-contamination level (S2S0). Then, the disc is
determined to be of good quality when the SER value is less than 4.2×10-3 (S270), and the
disc is determined to be of bad quality when the SER value is more than or equal to
4.2×10-3 (S280).
Instead of relying on the mere sensation (or personal judgment) of a manufacturer upon the
inspection for the contamination level of the disc, the present invention determines the quality
of the manufactured disc (i.e., good quality or bad quality) by adhering a contaminant on the
surface of the disc, measuring the SER value of the disc, and then determining the quality of
the disc.
As described above, the method for evaluating the anti-contamination level of the disc
surface according to the present invention has the following advantages. First, a level of
surface contamination, which largely affects the quality of a manufactured disc, can be
quantized based on an objective reference value and evaluated. In addition, the
characteristics of a protective coating film can also be quantized in order to enhance the
stability characteristics of the disc surface, thereby improving the reliability of the evaluation
result. Finally, the quality of the disc, i.e., whether the disc is of good quality or bad quality,
is accurately determined based on an objective reference value, thereby ensuring consistent
product characteristics and high reliability from users.

Industrial Applicability
It will be apparent to those skilled in the art that various modifications and variations can be
made in the present invention without departing from the spirit or scope of the inventions.
Thus, it is intended that the present invention covers the modifications and variations of this
invention provided they come within the scope of the appended claims and their equivalents.

WE CLAIM :
1. A method for evaluating an anti-contamination level on an optical recording
medium, comprising:
forming an artificial fingerprint on a surface of the optical recording medium by
contacting a stamp having an artificial material adhered thereto on an optical
recording medium;
measuring an error rate in an area where the artificial fingerprint is formed; and
comparing the measured error rate with a reference value to determine a
sensitivity for fingerprint,
wherein the optical disc is determined to have good quality if the measured
error rate is less than the reference value of 4.2x10-3.
2. The method as claimed in claim 1, wherein the artificial fingerprint material is
formed of at least any one of water, methanol, sodium chloride (NaCI), urea, lactic
acid, and violet dye.
3. The method as claimed in claim 1, wherein the stamp is formed of Si
(Silicone)-rubber.
4. The method as claimed in claim 1, wherein the stamp has a diameter of
approximately 10 millimeters (mm).
5. The method as claimed in claim 1, wherein the stamp contacts the disc with a
pressure of 500 grams (g).
6. A method for evaluating an anti-contamination level on a surface of optical
recording medium, comprising:

(a) contacting a stamp with a pressure on a stamp pad on which an artificial
fingerprint material is formed and adhering the artificial fingerprint material on the
stamp;
(b) contacting the stamp having the artificial fingerprint material on a surface of
optical recording medium to form an artificial fingerprint on the surface; and

(c) determining a sensitivity of the fingerprint depending upon an error rate on
the location where the artificial fingerprint is formed,
wherein the said determining step determines whether the optical recording
medium has the sensitivity by comparing the measured error rate with a reference
value and determines that the optical recording medium has good quality if the
measured error rate is less than a reference value of 4.2x10-3.
7. The method as claimed in claim 6, comprising:
controlling a number of contacting times of the stamp having the artificial stamp
material adhered thereon from step (a) to a dummy, according to a severe condition
or a standard condition.
8. The method as claimed in claim 7, wherein when the stamp is in a severe
condition the number of contacting times from the stamp to the dummy is 0 or 1, and
when the stamp is in a standard condition the number of contacting times from the
stamp to the dummy is between 2 and 4.
9. The method as claimed in claim 7, wherein, when the stamp is in a severe
condition, the step (c) involves determining the optical recording medium as being of
good quality when the error rate is less than 4.2x10-3.
10. The method as claimed in claim 7, wherein, when the stamp is in a standard
condition, the step (c) involves determining the optical recording medium as being of
good quality when the error rate is less than 1.5x10-3,.
11. The method as claimed in claim 7, wherein the dummy is formed of
polycarbonate.
12. The method as claimed in claim 6, wherein the artificial fingerprint material
is formed of at least any one of water, methanol, sodium chloride (NaCI), urea, lactic
acid, and violet dye.
13. The method as claimed in claim 6, wherein the stamp is formed of Si
(Silicone)-rubber.

14. The method as claimed in claim 6, wherein in step (a) the stamp is
contacted on the stamp pad with pressure of 500 grams (g).
15. The method as claimed in claim 9, wherein the step (b) contacts the stamp
being formed in the standard condition to an optical recording medium for a set
number of times and forming artificial fingerprints on the surface of optical recording
medium.
16. The method as claimed in claim 15, wherein, the step (b) contacts the
stamp on the surface of optical recording medium until the artificial fingerprint being
formed on the surface of optical recording medium covers at least 50% of one long
distance code (LDC) block of the optical recording medium.
17. The method of claim 16, wherein the step (c) involves determining the
optical recording medium as being of good quality when the error rate is less than
4.2x10-3.
18. An apparatus for evaluating an anti-contamination level on an optical
recording medium, comprising:
a stamp configured to form an artificial fingerprint on a surface of the optical
recording medium by contacting the stamp having an artificial material adhered
thereto on the optical recording medium;
a measuring unit configured to measure an error rate in an area where the
artificial fingerprint is formed; and
a control unit configured to control the measuring unit and configured to
compare the measured error rate with a reference value and to determine the optical
recording medium of good quality if the measured error rate is less than the
reference value of 4.2x10-3.
19. The apparatus as claimed in claim 18, wherein the artificial fingerprint
material is formed of at least any one of water, methanol, sodium chloride (NaCI),
urea, lactic acid, and violet dye.

20. The apparatus as claimed in claim 18, wherein the stamp is formed of Si
(Silicone)-rubber.
21. The apparatus as claimed in claim 18, wherein the stamp contacts the disc
with a pressure of 500 grams (g).
22. An apparatus for evaluating an anti-contamination level on an optical
recording medium, comprising:
a measuring unit configured to measure an error rate in an area where the
artificial fingerprint is formed on the optical recording medium, the artificial fingerprint
formed by contacting a stamp having artificial fingerprint material to the optical
recording medium; and
a control unit configured to compare the measured error rate with a reference
value and to determine the optical recording medium of good quality if the measured
error rate is less than the reference value of 4.2x10-3.

Documents:

00988-kolnp-2006-abstract.pdf

00988-kolnp-2006-assignment-1.1.pdf

00988-kolnp-2006-assignment.pdf

00988-kolnp-2006-claims.pdf

00988-kolnp-2006-correspondence others-1.1.pdf

00988-kolnp-2006-correspondence others.pdf

00988-kolnp-2006-description (complete).pdf

00988-kolnp-2006-drawings.pdf

00988-kolnp-2006-form1.pdf

00988-kolnp-2006-form3.pdf

00988-kolnp-2006-form5.pdf

00988-kolnp-2006-international publication.pdf

00988-kolnp-2006-pct form.pdf

00988-kolnp-2006-priority document.pdf

988-KOLNP-2006-ABSTRACT 1.1.pdf

988-kolnp-2006-assignment.pdf

988-KOLNP-2006-CANCELLED PAGES.pdf

988-KOLNP-2006-CLAIMS 1.1.pdf

988-KOLNP-2006-CORRESPONDENCE.pdf

988-kolnp-2006-correspondence1.1.pdf

988-KOLNP-2006-DESCRIPTION (COMPLETE) 1.1.pdf

988-KOLNP-2006-DRAWINGS 1.1.pdf

988-kolnp-2006-examination report1.1.pdf

988-KOLNP-2006-FORM 1.1.1.pdf

988-kolnp-2006-form 13.2.pdf

988-KOLNP-2006-FORM 13.pdf

988-kolnp-2006-form 18.pdf

988-KOLNP-2006-FORM 2.pdf

988-KOLNP-2006-FORM 3.1.1.pdf

988-kolnp-2006-form 3.2.pdf

988-KOLNP-2006-FORM 3.pdf

988-kolnp-2006-form 5.pdf

988-kolnp-2006-gpa.pdf

988-kolnp-2006-granted-abstract.pdf

988-kolnp-2006-granted-claims.pdf

988-kolnp-2006-granted-description (complete).pdf

988-kolnp-2006-granted-drawings.pdf

988-kolnp-2006-granted-form 1.pdf

988-kolnp-2006-granted-form 2.pdf

988-kolnp-2006-granted-specification.pdf

988-KOLNP-2006-OTHERS.pdf

988-kolnp-2006-others1.1.pdf

988-KOLNP-2006-PA.pdf

988-KOLNP-2006-PETITION UNDER RULE 137.pdf

988-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

988-kolnp-2006-reply to examination report1.1.pdf

abstract-00988-kolnp-2006.jpg


Patent Number 248482
Indian Patent Application Number 988/KOLNP/2006
PG Journal Number 29/2011
Publication Date 22-Jul-2011
Grant Date 19-Jul-2011
Date of Filing 19-Apr-2006
Name of Patentee LG ELECTRONICS INC.
Applicant Address 20, YOIDO-DONG, YOUNGDUNGPO-GU, SEOUL
Inventors:
# Inventor's Name Inventor's Address
1 LEE SEUNG YOON 2ND FL., #291-132, BULGWANG 2(I)-DONG, EUNPYEONG-GU, SEOUL
2 KIM JIN YONG 504-803, TAPMAEUL JINDEOK APT., YATAP-DONG, BUNDANG-GU, SEONGNAM-SI, GYEONGGI-DO
3 SEO HUN 403-701, SAETBYEOLMAEUL SAMBU APT, BUNDANG-DONG, BUNDANG-GU, SEONGNAM-SI, GYEONGGI-DO
4 KIM JIN HONG 108-1304, SHIN LG 1 CHA VILLAGE 1 CHA APT. SINBONG-DONG, YONGINSI, GYEONGGI-DO
PCT International Classification Number B32B 3/02
PCT International Application Number PCT/KR2004/002937
PCT International Filing date 2004-11-12
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10-2003-0080601 2003-11-14 Republic of Korea