# US 5,710,612 A · Liquid crystal device and manufacturing method therefor with anisotropic conductive adhesive connecting glass substrate and glass auxiliary substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,710,612 A - Document ID: US5710612A - Status: Granted - Kind: A - Application number: 07/851,659 - Filed: 1992-03-16 - Granted: 1998-01-20 - Earliest claimed: 1989-09-01 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Akira Mase - Web page: https://patentgrep.com/patent/US5710612A ## CPC - G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels} - H01R 4/04: using electrically conductive adhesives - H05K 3/323: {by applying an anisotropic conductive adhesive layer over an array of pads} - H05K 3/361: {Assembling flexible printed circuits with other printed circuits} - G02F 2203/69: Arrangements or methods for testing or calibrating a device - H05K 1/0306: {Inorganic insulating substrates, e.g. ceramic, glass} - H05K 1/148: {Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means} - H05K 3/368: {parallel to each other (H05K3/361 takes precedence)} - H05K 2201/0209: Inorganic, non-metallic particles - H05K 2201/0212: Resin particles - H05K 2201/0221: Insulating particles having an electrically conductive coating - H05K 2201/0233: Deformable particles - H05K 2201/0272: Mixed conductive particles, i.e. using different conductive particles, e.g. differing in shape - H05K 2201/0326: Inorganic, non-metallic conductor, e.g. indium-tin oxide [ITO] - H05K 2201/2036: Permanent spacer or stand-off in a printed circuit or printed circuit assembly - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A liquid crystal device and a manufacturing method thereof are described. The device comprises a liquid crystal panel and an auxiliary panel formed with an IC circuit for supplying driving signals to the liquid crystal device. The auxiliary substrate is separately provided with the circuit and the function thereof is tested in advance of the assembling with the liquid crystal panel. By this procedure, the yield is substantially improved. ## Claims ### Claim 1 A liquid crystal device comprising: first and second glass substrates; electrode arrangements respectively formed on inside surfaces of said substrates; a liquid crystal layer disposed between said first and second substrates; and circuits respectively formed on at least one glass auxiliary substrate and respectively connected with at least one of said electrode arrangements for supplying driving signals to said one electrode arrangement wherein said electrical connection is made through an anisotropic conductive adhesive fixing said auxiliary substrate in a predetermined position with respect to said electrode arrangement and simultaneously providing an electrical connection between both (a) said circuit formed on the auxiliary substrate and (b) the one electrode arrangement formed on the inside of one of the substrates, wherein at least one of said first and second substrates extends beyond the edge of the other in order to provide terminals of said one electrode arrangement with which said circuit makes electric contact. ### Claim 2 (depends on 1) The liquid crystal device of claim 1 wherein each of said first and second substrates is extending beyond the edge of the other in a different direction in order to provide terminals of said electrode arrangement with which said circuit makes electric contact. ### Claim 3 (depends on 1) The liquid crystal device of claim 1 wherein the number of said auxiliary substrates is two, one being connected to the first substrate and the other to the second substrate. ### Claim 4 (depends on 3) The liquid crystal device of claim 3 wherein said auxiliary substrates have extended portions which are joined to reinforce the mechanical strength of said device. ### Claim 5 A liquid crystal device comprising: first and second glass substrates; an electrode arrangement formed on the inside surfaces of said substrates; a liquid crystal layer disposed between said first and second substrates; and a circuit formed on at least one glass auxiliary substrate and connected with said electrode arrangement for supplying driving signals to said electrode arrangement wherein said electrical connection is made through an anisotropic conductive adhesive which contacts both (a) said circuit formed on the auxiliary substrate and (b) the electrode arrangement formed on the inside of one of the substrates. ### Claim 6 A liquid crystal device comprising: first and second glass substrates; electrode arrangements respectively formed on inside surfaces of said substrates; a liquid crystal layer disposed between said first and second substrates; and at least one glass auxiliary substrate on which semiconductor chips and electrical wiring for supplying driving signals to said liquid crystal layer are formed, wherein said first substrate extends beyond the edge of said second substrate in order to provide terminals of said electrode arrangement; and wherein said auxiliary substrate is directly attached to the extended portion of the first substrate through an anisotropic conductive adhesive so that said electrical wiring formed on said auxiliary substrate is electrically connected to said terminals. ### Claim 7 (depends on 6) The device of claim 6 wherein a reinforcement plate is attached over external surfaces of said auxiliary substrate and said second substrate. ### Claim 8 (depends on 6) The device of claim 6 wherein said auxiliary substrate has substantially the same thickness as said second substrate.