# US 11,999,135 B2 · Temporary bonding using polycationic polymers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,135 B2 - Document ID: US11999135B2 - Status: Granted - Kind: B2 - Application number: 16/639,664 - Filed: 2018-08-20 - Published: 2020-06-04 - Granted: 2024-06-04 - Earliest claimed: 2017-08-18 - Assignees: Corning Incorporated - Applicants: Corning Incorporated - Inventors: Kaveh Adib; Indrani Bhattacharyya; Pei-Chen Chiang; Hong-goo Choi; Dae youn Kim; Jen-Chieh Lin; Prantik Mazumder; Pei-Lien Tseng - Web page: https://patentgrep.com/patent/US11999135B2 ## CPC - B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} - B32B 17/1055: {characterized by the resin layer, i.e. interlayer} - B32B 7/06: permitting easy separation - B32B 17/10036: {comprising two outer glass sheets} - B32B 2307/728: Hydrophilic - Y02E 10/549: Organic PV cells - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Described herein are articles and methods of making articles, for example glass articles, comprising a thin sheet and a carrier, wherein the thin sheet and carrier are bonded together using a modification (coating) layer, for example a cationic polymer coating layer, and associated deposition methods, the carrier, or both, to control van der Waals, hydrogen and covalent bonding between the thin sheet and the carrier. The modification layer bonds the thin sheet and carrier together with sufficient bond strength to prevent delamination of the thin sheet and the carrier during high temperature (≤600° C.) processing while also preventing formation of a permanent bond between the sheets during such processing. ## Claims ### Claim 1 An article comprising: a first glass sheet comprising a first glass sheet bonding surface; a second glass sheet comprising a second glass sheet bonding surface; and a modification layer intermediate the first glass sheet and the second glass sheet, and comprising a modification layer bonding surface, the modification layer comprising one or more cationic polymers, wherein the modification layer couples the first glass sheet to the second glass sheet, further wherein the modification layer bonding surface directly contacts both the first glass sheet bonding surface and the second glass sheet bonding surface, further wherein the one or more cationic polymers are free of oxygen, further wherein the modification layer comprises an average thickness of from about 0.1 nm to about 100 nm, and further wherein the modification layer bonding surface is bonded with the second glass sheet bonding surface with a bond energy of from 250 to 450 mJ/m2 after holding the article at 425° C. for 90 minutes followed by holding the article at 600° C. for 10 minutes. ### Claim 2 (depends on 1) The article of claim 1, wherein the one or more cationic polymers are water soluble. ### Claim 3 (depends on 1) The article of claim 1, wherein the one or more cationic polymers are hydrophilic. ### Claim 4 (depends on 1) The article of claim 1, wherein the one or more cationic polymers comprise a polyalkyl backbone. ### Claim 5 (depends on 1) The article of claim 1, wherein a repeating unit of the one or more cationic polymers comprise one or more of a positively charged nitrogen, phosphorous, sulfur, boron or carbon. ### Claim 6 (depends on 5) The article of claim 5, wherein the repeating unit comprises the positively charged nitrogen. ### Claim 7 (depends on 6) The article of claim 6, wherein the repeating unit comprises a ratio of carbon:nitrogen of from 2:1 to 20:1. ### Claim 8 (depends on 5) The article of claim 5, wherein the positively charged nitrogen is an imidazolium cation. ### Claim 9 (depends on 5) The article of claim 5, wherein the repeating unit comprises or combinations thereof. ### Claim 10 (depends on 1) The article of claim 1, wherein the modification layer is substantially a monolayer. ### Claim 11 (depends on 1) The article of claim 1, wherein the average thickness of the modification layer is less than about 10 nm. ### Claim 12 (depends on 11) The article of claim 11, wherein the average thickness of the modification layer is from about 0.1 nm to less than about 5 nm. ### Claim 13 (depends on 11) The article of claim 11, wherein the average thickness of the modification layer is from about 0.1 nm to less than about 3 nm. ### Claim 14 (depends on 1) The article of claim 1, wherein the modification layer bonding surface is bonded with the second glass sheet bonding surface with a bond energy of from about 100 to about 600 mJ/m2 after holding the article at 580° C. for 10 minutes in a nitrogen environment. ### Claim 15 (depends on 1) The article of claim 1, wherein the second glass sheet does not spontaneously separate from the first glass sheet while the article is processed at a temperature in a range of from 250° C. to 600° C. ### Claim 16 (depends on 1) The article of claim 1, wherein the first glass sheet comprises a first average thickness, the second glass sheet comprises a second average thickness of less than or equal to 300 μm, and the second average thickness is less than the first average thickness. ### Claim 17 (depends on 1) The article of claim 1, wherein the modification layer covers from 20% to 90% of the first glass sheet bonding surface of the first glass sheet. ### Claim 18 An article comprising: a first glass sheet comprising a first glass sheet bonding surface; a second glass sheet comprising a second glass sheet bonding surface; and a modification layer intermediate the first glass sheet and the second glass sheet, and comprising a modification layer bonding surface contacting both the first glass sheet bonding surface and the second glass sheet bonding surface, the modification layer consisting of one or more cationic polymers, wherein the one or more cationic polymers are free of oxygen, further wherein the modification layer bonds the first glass sheet bonding surface to the second glass sheet bonding surface with an adhesion energy within a range of from 50 mJ/m2 to 1000 mJ/m2, and further wherein the modification layer bonding surface is bonded with the second glass sheet bonding surface with a bond energy of from 250 to 450 mJ/m2 after holding the article at 425° C. for 90 minutes followed by holding the article at 600° C. for 10 minutes. ### Claim 19 (depends on 18) The article of claim 18, wherein the modification layer comprises an average thickness of from about 0.1 nm to about 100 nm. ### Claim 20 (depends on 18) The article of claim 18, wherein the one or more cationic polymers are hydrophilic.