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WO2006107151A1 - An apparatus for evaporating electrode of liquid lens - Google Patents

An apparatus for evaporating electrode of liquid lens

Info

Publication number
WO2006107151A1
WO2006107151A1 PCT/KR2006/000932 KR2006000932W WO2006107151A1 WO 2006107151 A1 WO2006107151 A1 WO 2006107151A1 KR 2006000932 W KR2006000932 W KR 2006000932W WO 2006107151 A1 WO2006107151 A1 WO 2006107151A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
lens
liquid
surface
mask
electrode
Prior art date
Application number
PCT/KR2006/000932
Other languages
French (fr)
Inventor
In-Jae Kim
Chang-Seob Han
Tae-Kwon Hong
Yoon-Soo Lee
Original Assignee
Woowon Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/04Coating on selected surface areas, e.g. using masks
    • C23C14/042Coating on selected surface areas, e.g. using masks using masks

Abstract

Disclosed herein is an apparatus for depositing an electrode of a liquid lens, which serves to drive the liquid lens with electric power, and, more particularly, to an apparatus for depositing an electrode of a liquid lens, which has a simple structure operated in such a way of masking a lens part of a liquid lens instrument with a surface-treated metallic lens mask, attaching the surface- treated metallic lens mask to a magnet, and masking a remaining part of the lens instrument outside an electrode deposition part thereof with a sheet mask, followed by depositing the electrode on the lens instrument, thereby easily forming the electrode of the liquid lens. The apparatus comprises a jig of a predetermined shape having an upper surface to mount a liquid lens instrument, and a lower surface to secure a magnet, a metallic lens mask attached to the magnet while masking a lens part at a center of the instrument, and a sheet mask to cover a surface of the instrument outside the lens part thereof such that the electrode is prevented from being deposited on a peripheral edge of the instrument excluding an electrode deposition part of the instrument to be deposited with the electrode of the liquid lens.

Description

Description

AN APPARATUS FOR EVAPORATING ELECTRODE OF

LIQUID LENS

Technical Field

[1] The present invention relates to an apparatus for depositing an electrode of a liquid lens, which serves to drive the liquid lens with electric power applied thereto. More particularly, the present invention relates to an apparatus for depositing an electrode of a liquid lens, which has a simple structure configured to operate in such a way of masking a lens part of a liquid lens instrument with a surface-treated metallic lens mask, attaching the surface-treated metallic lens mask to a magnet, and masking a remaining part of the lens instrument outside an electrode deposition part thereof with a sheet mask, followed by depositing the electrode on the lens instrument, thereby easily forming the electrode of the liquid lens. Background Art

[2] Recently, cellular camera phones are popular with young people. However, as the cellular camera phones increases in popularity, the cellular camera phones do not satisfy increased demands of consumers by only providing a function to take pictures and transmit the pictures without limitation of places and times.

[3] Moreover, there is a limitation in size reduction of the camera, especially, for a camera lens, in comparison to a size reduction degree of the cellular phone which has been accomplished with a recent technology. Specifically, although consumers generally want to take pictures of subjects while performing focusing operation freely irrespective of distances from the camera to the subjects positioned from a near distance to a far distance, it is difficult to satisfy such a demand since it requires an increase in size of the camera mounted on the cellular phone.

[4] In order to solve the problem of the typical cellular phones as described above, there has been recently developed a liquid lens, which is reduced in size, and allows the focusing operation to be freely performed.

[5] The liquid lens is developed by taking an idea from an eye lens of a person. The thickness of eye lens is regulated by muscles, which are called zonules. When seeing a subject positioned at a near distance, the zonules slacken, and make the lens thick. Since the thick lens has high refractive force (refractive index), light is refracted at a high angle while passing through the lens.

[6] On the other hand, when seeing a subject positioned at a far distance, the zonules shrink, and make the lens thin. Since the thin lens has low refractive force, light is refracted at a low angle while passing through the lens. In this manner, for the eyes of normal eyesight, the thickness of the lens is automatically regulated so that an image of a subject is always correctly formed on the retina.

[7] The liquid lens, called a fluid-focus lens, is formed of liquid instead of glass or plastic materials, and allows a focus to be regulated by changing the surface shape of the liquid as in the eye lens.

[8] The liquid lens is formed by filling a cylindrical barrel having predetermined diameter and height with water and oil. The inner surface of the barrel is coated with a hydrophobic material, and has an affinity for the oil. Thus, a water droplet is present in an upwardly convex shape at the center thereof on the inner surface of the barrel.

[9] Here, when electric field is applied to the barrel, the hydrophobic property of the inner surface is lowered, and an affinity of the inner surface to water becomes similar to that of the oil so that the water droplet spreads in a flat shape thereon. If the intensity of the electric field increases, the inner surface of the barrel has a greater affinity for water than the oil, thereby causing the oil to be gathered at the center of the barrel, and allowing the water droplet to have a downwardly convex shape. That is, the water droplet serves as the eye lens, and variation of electric field serves as the zonules which regulate the thickness of the eye lens.

[10] As such, since the liquid lens is able to perform automatic focus regulation (auto focusing), a camera module of the cellular phone comprising the liquid lens allows the focusing operation to be performed by automatically changing the thickness according to a distance from the liquid lens to a subject without mechanically driving the liquid lens.

[11] Meanwhile, in order to allow the liquid lens to be automatically focused, it is necessary to apply electric field. Thus, it is necessary to provide a metallic electrode having an excellent conductivity to the liquid lens in order to allow application of external electric power thereto.

[12] Generally, such a conventional liquid lens is manufactured using an expensive apparatus via a complicated process such as chemical etching process and the like. Moreover, the liquid lens also requires subsidiary facilities, and a complicated depositing process, which results in an increase of manufacturing costs. Disclosure of Invention Technical Problem

[13] The present invention has been made to solve the above problems, and it is an object of the present invention to provide an apparatus for depositing an electrode of a liquid lens, which is configured to operate in such a way of masking a lens part of a liquid lens instrument with a metallic lens mask, attaching the lens mask to a magnet, and coating a predetermined portion outside the lens part with a metallic material, thereby easily forming the metallic electrode which can drive the liquid lens with electric power applied thereto. Technical Solution

[14] In accordance with one aspect of the present invention, the above and other objects can be accomplished by the provision of an apparatus for depositing an electrode of a liquid lens, comprising: a jig of a predetermined shape having an upper surface on which a liquid lens instrument is mounted, and a lower surface to which a magnet is secured; a metallic lens mask attached to the magnet while masking a lens part formed at a center of the liquid lens instrument and a sheet mask to cover a surface of the liquid lens instrument outside the lens part thereof such that the electrode of the liquid lens is prevented from being deposited on a peripheral edge of the liquid lens instrument excluding an electrode deposition part of the liquid lens instrument to be deposited with the electrode of the liquid lens.

[15] Preferably, the upper surface of the jig has a liquid lens receiving groove to mount the liquid lens instrument, and the lower surface of the jig has a magnet receiving groove to secure the magnet.

[16] Preferably, the jig is formed of a plastic material or a metallic material not reacting with the magnet. Accordingly, with the structure of the jig which does not react with the magnet, the metallic lens mask can be attached to the magnet while masking the in- strumenton the upper surface of the jig.

[17] Preferably, the lens mask has a frustoconical shape or a flare shape such that a bottom surface of the lens mask having a greater diameter is brought into contact with the lens part. In addition, the bottom surface of the lens mask has a concave shape to allow only a ring-shaped peripheral edge of the bottom surface to be brought into contact with the lens part.

[18] Preferably, the ring-shaped peripheral edge of the lens mask contacting the lens part has a curved surface of a predetermined curvature or a flat surface to minimize damage of the lens part.

[19] Preferably, the lens mask is subjected to surface treatment with a coat of polymeric compounds or plastic materials in order to minimize the damage of the lens part. Preferably, the coat is one of parylene, polyethylene, polypropylene, poly vinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), acryl, poly carbonate (PC), polyurethane (PU), protactinium (PA), and Teflon.

[20] Preferably, the sheet mask is formed of a plastic material or a metallic material that does not react with the magnet. Accordingly, only the lens mask reacts with the magnet, and can be securely attached to the magnet.

[21] Preferably, the electrode of the liquid lens is deposited by sputtering, thermal vacuum deposition, or electronic beam deposition.

Advantageous Effects

[22] As apparent from the above description, one of advantageous effects of the present invention is that the apparatus employs simple instrumentation such as the surface treated metallic lens mask, and the magnet secured to a lower surface of the jig to secure the lens mask when depositing the electrode of the liquid lens, thereby considerably simplifying a process of depositing the electrode of the liquid lens.

[23] In addition, the apparatus of the present invention has other advantageous effects in that the apparatus enables a simple process in comparison to a chemical etching process, and does not require subsidiary facilities or chemical organic solvents, thereby reducing manufacturing costs for depositing the electrode of the liquid lens.

Brief Description of the Drawings

[24] The foregoing and other objects and features of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: [25] Fig. 1 is a view illustrating the overall configuration of an apparatus for depositing an electrode of a liquid lens in accordance with one embodiment of the present invention; [26] Fig. 2 is a partially enlarged cross-sectional view of the apparatus shown in Fig. 1; and [27] Fig. 3 is an enlarged perspective view illustrating a lens mask applied to the present invention.

Best Mode for Carrying Out the Invention [28] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. [29] Fig. 1 is a view illustratingthe overall configuration of an apparatus for depositing an electrode of a liquid lens in accordance with one embodiment of the present invention, and Fig. 2 is a partially enlarged cross-sectional view of the apparatus shown in Fig. 1. [30] As shown in Fig. 1, the apparatus of the present invention comprises a jig 10 having a predetermined shape, liquid lens instruments 30 mounted on an upper surface of the jig 10, a magnet 20 secured to a lower surface of the jig 10, a lens mask 40 to mask a lens part formed at the center of each liquid lens instrument 30, and a sheet mask 50 to cover a peripheral edge of each liquid lens instrument 30. [31] As shown in Fig. 1, the jig 10 has at least two liquid lens instruments 30 mounted on the upper surface thereof, and the magnets 20 secured to the lower surface thereof, which correspond to the liquid lens instruments 30, respectively. That is, the apparatus according to the invention deposits electrodes of liquid lenses on the at least two liquid lens instruments 30.

[32] Fig. 2 is a partially enlarged cross-sectional view illustrating a part (denoted by mark "A" in Fig. 1) of the apparatus shown in Fig. 1.

[33] Each liquid lens instrument 30 is mounted on the upper surface of the jig 10 having the predetermined shape, and each magnet 20 is secured to the lower surface of the jig 10 on a line coaxial with the liquid lens instrument 30.

[34] Preferably, the upper surface of the jig 10 is formed with a liquid lens receiving groove 11 to allow the liquid lens instrument 30 to be mounted therein, and the lower surface of the jig 10 is formed with a magnet receiving groove 13 to allow the magnet to be secured thereto.

[35] The jig 10, where the lens instruments 30 and the magnets 20 will be mounted or secured, is formed of a plastic material or a metallic material which does not react with the magnet. Thus, only the lens mask 40 described below reacts with the magnet 20, and can be securely attached to the instrument 30.

[36] The liquid lens is formed at the center of each liquid lens instrument 30, and the metallic electrode is formed at the peripheral edge thereof, to which electric current is applied. With this structure of the invention, the electrode of the liquid lens is deposited in a ring shape on an electrode deposition part 33 of the liquid lens instrument 30 outside the lens part 31 thereof.

[37] Since the liquid lens is formed on the lens part 31 positioned at the center of the liquid lens instrument 30, it is necessary to mask the lens part 31 in order to prevent the lens part 31 from being deposited with the electrode during a process of depositing the electrode of the liquid lens on the electrode deposition part 33 of the liquid lens instrument 30.

[38] The lens part 31 of the liquid lens instrument 30 is masked by the metallic lens mask 40 having a predetermined shape. It is necessary for the lens mask 40 not to move during the process of depositing the electrode on the electrode deposition part 33 of the liquid lens instrument 30. In order to prevent the lens mask 40 from moving on the lens part 31 of the liquid lens instrument 30, the magnet 20 is secured to the lower surface of the jig 10 which has the liquid lens instrument 30 mounted on the upper surface.

[39] Thus, the lens mask 40 must be made of a metallic material which reacts with the magnet 20, and is configured to prevent the lens part 31 of the liquid lens instrument 30 from being damaged thereby.

[40] The lens mask 40 has a frustoconical shape, which is formed as shown in (a) of Fig.

3 by removing an upper portion of a cone, or a flare shape as shown in (b) of Fig. 3. With such a shape, the lens mask 40 has a bottom surface, which has a greater diameter and is brought into contact with the lens part 31 of the liquid lens instrument 30.

[41] For the lens mask 40 configured to allow the bottom surface thereof to contact the lens part 31, the bottom surface of the lens mask 40 preferably has a concave shape 41 in order to prevent damage of the lens part 31 by minimizing a contact area between the bottom surface of the lens mask 40 and the lens part 31. With this structure, among the bottom surface of the lens mask 40, only a ring-shaped peripheral edge is brought into contact with the lens part 31.

[42] The ring-shaped peripheral edge of the bottom surface in contact with the lens part

31 preferably has a curved surface 43 having a predetermined curvature or a flat surface to prevent scratches from being formed on the lens part thereby.

[43] In order to prevent particles from being created on the lens part 31 due to damage of the lens part 31 by the lens mask 40, the lens mask 40 is subjected to surface treatment with a coat of polymeric compounds or plastic material.

[44] Preferably, the coat used for the surface treatment of the lens mask 40 includes parylene, polyethylene, polypropylene, poly vinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), acryl, poly carbonate (PC), polyurethane (PU), protactinium (PA), Teflon, and the like.

[45] After one of the coats described above is applied to an overall surface of the metallic lens mask 40, the surface of the lens mask 40 is heated at a predetermined temperature, or is subjected to chemical treatment so that the lens mask 40 has a smooth surface.

[46] With the lens mask 40 masking the lens part 31 of the liquid lens instrument 30, the sheet mask 50 is covered on a portion of the liquid lens instrument 30 to deposit an electrode 60 of the liquid lens on the electrode deposition part 33.

[47] That is, the sheet mask 50 covers the peripheral edge of the liquid lens instrument

30 excluding the electrode deposition part 33, on which the electrode of the liquid lens will be deposited, among the upper surface of the liquid lens instrument 30 outside the lens part 31. Accordingly, when an electrode material is deposited on the liquid lens instrument 30 via various deposition processes, the material can be deposited only on the electrode deposition part 33, thereby forming the electrode 60 of the liquid lens.

[48] In order to allow the sheet mask 50 to cover the liquid lens instrument 30 such that the sheet mask 50 masks only a portion of the liquid lens instrument 30 excluding the lens part 31 and the electrode deposition part 33 of the liquid lens instrument 30, it is necessary for the sheet mask 50 to have a hole formed therein, which allows the lens mask 40 to be positioned therein. In addition, the sheet mask 50 is preferably formed of a plastic material or a metallic material which does not react with the magnet 20 secured to the lower surface of the jig 10.

[49] With the sheet mask 50 covering the liquid lens instrument 30, the electrode material is deposited on the liquid lens instrument 30. Deposition of the electrode 60 may be performed by sputtering, thermal vacuum deposition, or electronic beam deposition.

[50] The apparatus for depositing the electrode of the liquid lens having the structure, operation and embodiments as described above can be applied to various deposition processes without being limited to the embodiment in which the electrode of the liquid lens is deposited. That is, when forming a predetermined pattern by a masking process, the pattern can be formed by the apparatus employing the magnet and the metallic mask having the predetermined shape.

[51] It should be understood that the embodiments and the accompanying drawings have been described for illustrative purposes and the present invention is limited only by the following claims. Further, those skilled in the art will appreciate that various modifications, additions and substitutions are allowed without departing from the scope and spirit of the invention as set forth in the accompanying claims.

[52]

Claims

Claims
[I] An apparatus for depositing an electrode of a liquid lens, comprising: a jig of a predetermined shape having an upper surface on which a liquid lens instrument is mounted, and a lower surface to which a magnet is secured; a metallic lens mask attached to the magnet while masking a lens part formed at a center of the liquid lens instrument; and a sheet mask to cover a surface of the liquid lens instrument outside the lens part thereof such that the electrode of the liquid lens is prevented from being deposited on a peripheral edge of the liquid lens instrument excluding an electrode deposition part of the liquid lens instrument to be deposited with the electrode of the liquid lens. [2] The apparatus as set forth in claim 1, wherein the upper surface of the jig has a liquid lens receiving groove to mount the liquid lens instrument. [3] The apparatus as set forth in claim 2, wherein the lower surface of the jig has a magnet receiving groove to secure the magnet. [4] The apparatus as set forth in claim 3, wherein the jig is formed of a plastic material or a metallic material not reacting with the magnet. [5] The apparatus as set forth in claim 1, wherein the lens mask has a frustoconical shape or a flare shape such that a bottom surface of the lens mask having a greater diameter is brought into contact with the lens part. [6] The apparatus as set forth in claim 5, wherein the bottom surface of the lens mask has a concave shape to allow only a ring-shaped peripheral edge of the bottom surface to be brought into contact with the lens part. [7] The apparatus as set forth in claim 6, wherein the ring-shaped peripheral edge of the lens mask contacting the lens part has a curved surface of a predetermined curvature or a flat surface. [8] The apparatus as set forth in claim 6, wherein the lens mask is subjected to surface treatment with a coat of polymeric compounds or plastic materials. [9] The apparatus as set forth in claim 8, wherein the coat is one of parylene, polyethylene, polypropylene, poly vinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), acryl, poly carbonate (PC), polyurethane (PU), protactinium
(PA), and Teflon. [10] The apparatus as set forth in claim 1, wherein the sheet mask is formed of a plastic material or a metallic material not reacting with the magnet.
[I I] The apparatus as set forth in claim 1, wherein the electrode of the liquid lens is deposited by sputtering, thermal vacuum deposition, or electronic beam deposition.
PCT/KR2006/000932 2005-03-15 2006-03-15 An apparatus for evaporating electrode of liquid lens WO2006107151A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20050021406A KR100644350B1 (en) 2005-03-15 2005-03-15 a apparatus for evaporating electrode of liquid lens
KR10-2005-0021406 2005-03-15

Publications (1)

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WO2006107151A1 true true WO2006107151A1 (en) 2006-10-12

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100765863B1 (en) * 2006-02-06 2007-10-10 주식회사 탑 엔지니어링 Apparatus and method for attaching front panel of requid Lens
KR100815327B1 (en) * 2006-08-10 2008-03-19 삼성전기주식회사 Liquid-lens module
KR101616792B1 (en) * 2014-10-06 2016-04-29 박진선 The method for manufacturing a sputtering cover
KR101580587B1 (en) * 2015-08-07 2015-12-28 주식회사 유아이디 cell type panel fixing device for sputtering

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0391237A (en) * 1989-09-01 1991-04-16 Sharp Corp Mask for vapor deposition
JPH05117839A (en) * 1991-10-28 1993-05-14 Dainippon Printing Co Ltd Jig for sputtering
JP2003059671A (en) * 2001-08-20 2003-02-28 Sony Corp Display element and its manufacturing method
WO2003069380A1 (en) * 2002-02-14 2003-08-21 Koninklijke Philips Electronics N.V. Variable focus lens
KR100462520B1 (en) * 2003-11-27 2004-12-09 주식회사 포인칩스 Driver of liquid-filled lens generating high-voltage drive signal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003303451A (en) * 2002-04-04 2003-10-24 Tdk Corp Method for transferring substrate to film formation device for disk-like substrate, substrate transfer mechanism and mask used for the method and method for manufacturing disk-like recording medium using the method
JP3957173B2 (en) * 2002-06-20 2007-08-15 Tdk株式会社 The method of manufacturing a disc-shaped delivery method of the substrate relative to the substrate for a deposition apparatus, the substrate transfer mechanism and the substrate holder used in this method, and a disk-shaped recording medium using the method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0391237A (en) * 1989-09-01 1991-04-16 Sharp Corp Mask for vapor deposition
JPH05117839A (en) * 1991-10-28 1993-05-14 Dainippon Printing Co Ltd Jig for sputtering
JP2003059671A (en) * 2001-08-20 2003-02-28 Sony Corp Display element and its manufacturing method
WO2003069380A1 (en) * 2002-02-14 2003-08-21 Koninklijke Philips Electronics N.V. Variable focus lens
KR100462520B1 (en) * 2003-11-27 2004-12-09 주식회사 포인칩스 Driver of liquid-filled lens generating high-voltage drive signal

Also Published As

Publication number Publication date Type
KR20050098772A (en) 2005-10-12 application
KR100644350B1 (en) 2006-11-10 grant

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