# US 11,306,223 B2 · Double-sided adhesive tape, electronic instrument provided with double-sided adhesive tape, disassembly structure provided with double-sided adhesive tape, and adhered structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,223 B2 - Document ID: US11306223B2 - Status: Granted - Kind: B2 - Application number: 15/554,165 - Filed: 2016-04-20 - Published: 2018-10-11 - Granted: 2022-04-19 - Earliest claimed: 2015-07-21 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Masahiko Mitsuboshi - Web page: https://patentgrep.com/patent/US11306223B2 ## CPC - C09J 7/38: Pressure-sensitive adhesives [PSA] - B32B 5/20: foamed in situ - C09J 5/06: involving heating of the applied adhesive - C09J 7/20: characterised by their carriers - C09J 7/30: characterised by the adhesive composition - C09J 9/02: Electrically-conducting adhesives - C09J 201/00: Adhesives based on unspecified macromolecular compounds - C08K 3/08: Metals - C08K 9/10: Encapsulated ingredients - C09J 2203/326: for bonding electronic components such as wafers, chips or semiconductors - C09J 2301/124: the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape - C09J 2301/204: the adhesive coating being discontinuous - C09J 2301/302: the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C - C09J 2301/408: additives as essential feature of the adhesive layer - C09J 2301/41: additives as essential feature of the carrier layer - C09J 2301/412: presence of microspheres - C09J 2301/502: process for debonding adherents - C09J 2400/163: in the substrate - H05K 1/181: associated with surface mounted components - H05K 2201/10037: Printed or non-printed battery - H05K 2201/10053: Switch - Y02E 60/10: Energy storage using batteries - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Provided is an adhesion technology that can separate adherends with their recycling as a premise while meeting their reliability guarantee temperature conditions. A double-sided, pressure-sensitive adhesive tape includes a pair of pressure-sensitive adhesive layers and an electrically-conductive heat generating layer disposed between the paired pressure-sensitive adhesive layers. At least one of the paired pressure-sensitive adhesive layers contains a heat-foaming agent, and at least one of opposite end faces of the electrically-conductive heat generating layer extends out beyond a corresponding end face of the at least one pressure-sensitive adhesive layer. ## Claims ### Claim 1 A double-sided pressure-sensitive adhesive tape, comprising: a pair of pressure-sensitive adhesive layers, wherein the pair of the pressure-sensitive adhesive layers includes a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer; and an electrically-conductive heat generating layer between the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, wherein the electrically-conductive heat generating layer is in contact with each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, the electrically-conductive heat generating layer includes a first end face and a second end face that is opposite to the first end face in a longitudinal direction of the double-sided pressure-sensitive adhesive tape, at least one of the first pressure-sensitive adhesive layer or the second pressure-sensitive adhesive layer includes a heat-foaming agent, a heat generating temperature of the electrically-conductive heat generating layer is higher than a foaming starting temperature of the heat-foaming agent, a temperature difference between the heat generating temperature and the foaming starting temperature is in a range of 10° C. to 50° C., the heat-foaming agent includes liquefied hydrocarbon in microcapsules of at least one of polyvinyl chloride or polyvinylidene, each of the first end face and the second end face of the electrically-conductive heat generating layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction, the second pressure-sensitive adhesive layer includes a third end face and a fourth end face opposite to the third end face in the longitudinal direction, and each of the third end face and the fourth end face of the second pressure-sensitive adhesive layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction. ### Claim 2 (depends on 1) The double-sided pressure-sensitive adhesive tape according to claim 1, wherein the foaming starting temperature is higher than a guarantee temperature of an adherend, and the adherend is bonded to the at least one of the first pressure-sensitive adhesive layer or the second pressure-sensitive adhesive layer. ### Claim 3 (depends on 1) The double-sided pressure-sensitive adhesive tape according to claim 1, wherein each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer contains the heat-foaming agent. ### Claim 4 An electronic device, comprising: an internal power supply configured to drive the electronic device; an adherend; and a double-sided pressure-sensitive adhesive tape configured to bond the internal power supply with the adherend, wherein the double-sided pressure-sensitive adhesive tape includes: a first pressure-sensitive adhesive layer bonded with the internal power supply; a second pressure-sensitive adhesive layer bonded with the adherend; and an electrically-conductive heat generating layer between the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, wherein the electrically-conductive heat generating layer is in contact with the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, the electrically-conductive heat generating layer includes a first end face and a second end face that is opposite to the first end face in a longitudinal direction of the double-sided pressure-sensitive adhesive tape, at least one of the first pressure-sensitive adhesive layer or the second pressure-sensitive adhesive layer includes a heat-foaming agent, a heat generating temperature of the electrically-conductive heat generating layer is higher than a foaming starting temperature of the heat-foaming agent, a temperature difference between the heat generating temperature and the foaming starting temperature is in a range of 10° C. to 50° C., the heat-foaming agent includes liquefied hydrocarbon in microcapsules of at least one of polyvinyl chloride or polyvinylidene, each of the first end face and the second end face of the electrically-conductive heat generating layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction, the second pressure-sensitive adhesive layer includes a third end face and a fourth end face opposite to the third end face in the longitudinal direction, and each of the third end face and the fourth end face of the second pressure-sensitive adhesive layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction. ### Claim 5 (depends on 4) The electronic device according to claim 4, wherein the foaming starting temperature is higher than a guarantee temperature of the internal power supply. ### Claim 6 (depends on 4) The electronic device according to claim 4, wherein the first pressure-sensitive adhesive layer contains the heat foaming agent. ### Claim 7 A dismantlable structure, comprising: a double-sided pressure-sensitive adhesive tape; and a combination of adherends bonded with each other via the double-sided pressure-sensitive adhesive tape, wherein the double-sided pressure-sensitive adhesive tape includes: a pair of pressure-sensitive adhesive layers, wherein the pair of the pressure-sensitive adhesive layers includes a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer; and an electrically-conductive heat generating layer between the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, wherein the electrically-conductive heat generating layer is in contact with each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, the electrically-conductive heat generating layer includes a first end face and a second end face that is opposite to the first end face in a longitudinal direction of the double-sided pressure-sensitive adhesive tape, at least one of the first pressure-sensitive adhesive layer or the second pressure-sensitive adhesive layer includes a heat-foaming agent, a heat generating temperature of the electrically-conductive heat generating layer is higher than a foaming starting temperature of the heat-foaming agent, a temperature difference between the heat generating temperature and the foaming starting temperature is in a range of 10° C. to 50° C., the heat-foaming agent includes liquefied hydrocarbon in microcapsules of at least one of polyvinyl chloride or polyvinylidene, each of the first end face and the second end face of the electrically-conductive heat generating layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction, the second pressure-sensitive adhesive layer includes a third end face and a fourth end face opposite to the third end face in the longitudinal direction, and each of the third end face and the fourth end face of the second pressure-sensitive adhesive layer extends beyond a corresponding end face of the first pressure-sensitive adhesive layer in the longitudinal direction, and the combination of the adherends is dismantled by a heating operation of at least one of the first end face or the second end face of the electrically-conductive heat generating layer, and expansion by a foaming operation of the at least one of the first pressure-sensitive adhesive layer or the second pressure-sensitive adhesive layer includes the heat-foaming agent.