US 8,147,640 B2Granted

Fabricating method of flexible display

AssigneeLG Display Co., Ltd.

InventorsHyun Sik Seo, Seung Han Paek, Nack Bong Choi

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Abstract

A fabricating method of a flexible display device includes the steps of providing an adhesive layer including a first adhesive material on a first surface of a support film, a second adhesive material on a second surface of the support film such that an adhesive strength of the second adhesive material is lower than an adhesive strength of the first adhesive material, and a third adhesive material encompassing an edge of the second adhesive material such that an adhesive strength of the third adhesive material is higher than the adhesive strength of the second adhesive material; a first passivation film adhered to the first surface of the support film with the first adhesive material therebetween; and a second passivation film adhered to the second surface of the support film with the second adhesive material and the third adhesive material therebetween; peeling the first passivation film from the adhesive layer; adhering a rigid substrate to the first adhesive material; peeling the second passivation film from the adhesive layer; and adhering a flexible substrate onto the second and third adhesive materials.

Claims6

Dependent claims

A method of fabricating a flexible display device, comprising the steps of:

providing first and second flexible substrates,
providing first and second rigid substrates,
providing first and second adhesive sheets, each adhesive sheet comprising first and second adhesive layers on respective first and second surfaces of a support film, each first adhesive layer including a first adhesive material and each second adhesive layer including a second adhesive material and a third adhesive material, wherein the second adhesive material has an adhesive strength lower than an adhesive strength of the first adhesive material, wherein the third adhesive material has an adhesive strength higher than the adhesive strength of the second adhesive material, wherein the second adhesive material of each adhesive sheet is formed on the second surface of the support film excluding a perimeter width from a perimeter edge of the support film, wherein the third adhesive material of each adhesive sheet is formed on an area corresponding to the predetermined width and wherein the predetermined width is between 2 and 8 mm, each adhesive sheet further comprising a first passivation film adhered to the first adhesive material and a second passivation film adhered to the second adhesive material and the third adhesive material,
peeling the first passivation film from the first adhesive material of each of the first and second adhesive sheets,
adhering the first and second rigid substrates to the first adhesive material of the first and second adhesive sheets, respectively,
peeling the second passivation film from the second adhesive material of each of the first and second adhesive sheets,
adhering the first and second flexible substrates onto the second and third adhesive materials of the first and second adhesive sheets, respectively,
bonding the first and second flexible substrates and injecting a liquid crystal into a space therebetween,
and peeling the first and second rigid substrates from the first adhesive material of the first and second adhesive sheets, respectively.

6 more elements

A method of fabricating a flexible display device, comprising the steps of:

providing first and second flexible substrates,
providing first and second rigid substrates,
providing first and second adhesive sheets, each adhesive sheet comprising first and second adhesive layers on respective first and second surfaces of a support film, each first adhesive layer including a first adhesive material and each second adhesive layer including a second adhesive material and a third adhesive material, wherein the second adhesive material has an adhesive strength lower than an adhesive strength of the first adhesive material, wherein the third adhesive material has an adhesive strength higher than the adhesive strength of the second adhesive material, wherein the second adhesive material of each adhesive sheet is formed on the entire second surface of the support film, wherein the third adhesive material of each adhesive sheet is formed on the second adhesive material with a predetermined width from a perimeter edge of the support film and wherein the predetermined width is between 2 and 8 mm, each adhesive sheet further comprising a first passivation film adhered to the first adhesive material and a second passivation film adhered to the second adhesive material and the third adhesive material,
peeling the first passivation film from the first adhesive material of each of the first and second adhesive sheets,
adhering the first and second rigid substrates to the first adhesive material of the first and second adhesive sheets, respectively,
peeling the second passivation film from the second adhesive material of each of the first and second adhesive sheets,
adhering the first and second flexible substrates onto the second and third adhesive materials of the first and second adhesive sheets, respectively,
bonding the first and second flexible substrates and injecting a liquid crystal into a space therebetween,
and peeling the first and second rigid substrates from the first adhesive material of the first and second adhesive sheets, respectively.

6 more elements

A method of fabricating a flexible display device, comprising the steps of:

providing first and second flexible substrates,
providing first and second rigid substrates,
providing first and second adhesive sheets, each adhesive sheet comprising first and second adhesive layers on respective first and second surfaces of a support film, each first adhesive layer including a first adhesive material and each second adhesive layer including a second adhesive material, wherein the second adhesive material has an adhesive strength lower than an adhesive strength of the first adhesive material, each adhesive sheet further comprising a first passivation film adhered to the first adhesive material and a second passivation film adhered to the second adhesive material,
peeling the first passivation film from the first adhesive material of each of the first and second adhesive sheets,
adhering the first and second rigid substrates to the first adhesive material of the first and second adhesive sheets, respectively,
peeling the second passivation film from the second adhesive material of each of the first and second adhesive sheets,
forming a third adhesive material on the second adhesive layer of each adhesive sheet with a predetermined width from a perimeter edge of the support film, wherein an adhesive strength of the third adhesive material is higher than the adhesive strength of the second adhesive material and wherein the predetermined width is between 2 and 8 mm,
adhering the first and second flexible substrates onto the second and third adhesive materials provided on the first and second adhesive sheets, respectively,
bonding the first and second flexible substrates and injecting a liquid crystal into a space therebetween,
and peeling the first and second rigid substrates from the first adhesive material of the first and second adhesive sheets, respectively.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/311,377Filed 20 Dec 2005
Priority: KR 10-2005-004024013 May 2005
Published: US 2006/0254704 A116 Nov 2006
Granted: 3 Apr 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G02F 1/133305
Constructional arrangements; Manufacturing methods: flexible substrates, e.g. plastics, organic film
B32B 37/12
Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding: characterised by using adhesives
C09J 7/38
Characterised by the adhesive composition: pressure-sensitive adhesives [PSA]
B32B 2457/20
Electrical equipment: displays, e.g. liquid crystal displays, plasma displays

Family

US 2006/0254704 A1Pre-grant publication · published 16 Nov 2006
US 8,147,640 B2This patent

From the US filing history. Foreign family members aren’t listed.

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