US2022258297A1PendingUtilityA1

Method of manufacturing window and window for display device

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Assignee: SAMSUNG DISPLAY CO LTDPriority: Feb 16, 2021Filed: Sep 28, 2021Published: Aug 18, 2022
Est. expiryFeb 16, 2041(~14.5 yrs left)· nominal 20-yr term from priority
Inventors:Cheolmin ParkSeungho KimHoikwan LeeByunghoon KangSeung Ho KimChangmoo Lee
B24B 9/10C03C 27/10C03B 33/076C03B 33/02B24B 41/005B24B 57/02C03B 33/078B24B 41/06B24B 9/20B24B 41/002B24B 29/02B24B 1/00C03B 33/07C03C 27/04C03C 23/002B65G 43/00B65G 1/1373B62D 51/001G09F 9/301G05D 1/0088
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Claims

Abstract

A method of manufacturing a window may include cutting a window having a uniform thickness of about 20 μm to about 100 μm and polishing a cut surface of the window with a polishing pad having an elastic modulus less than an elastic modulus of the window while applying slurry to the cut surface of the window.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method of manufacturing a window, the method comprising:
 cutting a window, the window having a uniform thickness within a range of about 20 μm to about 100 μm;   applying a slurry to a cut surface of the window; and   polishing the cut surface of the window with a polishing pad while the slurry is applied to the cut surface of the window,   wherein the polishing pad has an elastic modulus that is less than an elastic modulus of the window.   
     
     
         2 . The method of  claim 1 , wherein the window includes glass and/or plastic. 
     
     
         3 . The method of  claim 1 , wherein a hardness of the polishing pad is less than a hardness of the window. 
     
     
         4 . The method of  claim 1 , wherein the polishing pad includes a fabric, wool, and/or a polymer. 
     
     
         5 . The method of  claim 1 , wherein the slurry includes cerium(IV) oxide (CeO 2 ). 
     
     
         6 . The method of  claim 1 , wherein polishing the cut surface of the window includes polishing the window to reduce its length within a range of from about 10% to about 200% of a thickness of the window. 
     
     
         7 . The method of  claim 1 , further comprising:
 before the cutting of the window, or after the cutting of the window and before the polishing of the cut surface of the window,   forming a first adhesive layer and a second adhesive layer respectively on a first surface of the window and a second surface of the window opposite to the first surface.   
     
     
         8 . The method of  claim 7 , wherein an elastic modulus of each of the first adhesive layer and the second adhesive layer is less than the elastic modulus of the window. 
     
     
         9 . The method of  claim 7 , wherein a hardness of each of the first adhesive layer and the second adhesive layer is less than a hardness of the window. 
     
     
         10 . The method of  claim 7 , wherein each of the first adhesive layer and the second adhesive layer includes a resin, an optically clear adhesive (OCA), a rosin, and/or a wax. 
     
     
         11 . The method of  claim 7 , further comprising:
 after the polishing of the cut surface of the window,   curing the window, the first adhesive layer, and the second adhesive layer, and   separating each of the first adhesive layer and the second adhesive layer from the window.   
     
     
         12 . The method of  claim 1 , further comprising:
 after the cutting of the window and before the polishing of the cut surface of the window,   disposing the window between a first support and a second support.   
     
     
         13 . The method of  claim 12 , wherein an area of each of the first support and the second support is less than an area of the window. 
     
     
         14 . A window for a display device, the window comprising:
 a flat portion having a uniform thickness within a range of about 20 μm to about 100 μm; and   a chamfer portion disposed on at least a portion of an edge of the flat portion, the chamfer portion having an average thickness that is less than a thickness of the flat portion, and having an outer surface of a curved shape protruding from the flat portion.   
     
     
         15 . The window of  claim 14 , wherein a roughness of the outer surface of the chamfer portion is about 0.5 nm to about 10 nm. 
     
     
         16 . The window of  claim 14 , wherein a distance from an edge of the chamfer portion to the edge of the flat portion is in a range of about 10% to about 200% of a thickness of the flat portion. 
     
     
         17 . The window of  claim 14 , wherein the chamfer portion includes a first curved portion adjacent to a first surface of the flat portion and a second curved portion adjacent to a second surface of the flat portion that is opposite to the first surface of the flat portion, and
 wherein a radius of curvature of each of the first curved portion and the second curved portion is in a range of from about 10% to about 50% of a thickness of the flat portion.   
     
     
         18 . The window of  claim 14 , wherein the chamfer portion has a single uniform radius of curvature, and
 wherein the single uniform radius of curvature is in a range of from about 50% to about 100% of a thickness of the flat portion.   
     
     
         19 . The window of  claim 14 , wherein the chamfer portion has multiple different radiuses of curvature along the outer surface of the chamfer portion, and
 wherein each of the multiple radiuses of curvature along the outer surface of the chamfer portion is in a range of from about 20% to about 200% of a thickness of the flat portion.   
     
     
         20 . The window of  claim 19 , wherein the outer surface of the chamfer portion adjacent to a surface of the flat portion has an included angle of about 10 degrees to about 30 degrees with respect to a plane of the flat portion. 
     
     
         21 . A method of manufacturing a window of a display device, the method comprising:
 alternately stacking a plurality of windows and a plurality of adhesive layers into a single stack;   cutting the single stack;   polishing a cut surface of the single stack using a polishing pad while a slurry is applied to the cut surface of the single stack;   curing the single stack; and   separating each of the plurality of windows from the single stack after the single stack has been cured,   wherein the polishing pad has an elastic modulus that is less than an elastic modulus of the window.   
     
     
         22 . The method of  claim 21 , wherein the curing includes exposing the single stack to UV light and emerging the single stack into a bath of hot water. 
     
     
         23 . The method of  claim 21 , wherein the polishing of the cut surface of the single stack includes polishing each of the plurality of adhesive layers shorter than each of the plurality of windows such that edges of each of the plurality of windows extend past corresponding edges of each of the plurality of adhesive layers.

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