IP Library › Granted Patent US 12661877
Granted Patent B2
US 12661877 · App. 18/284,401 · Granted Jun 23, 2026

Member supplying sheet

Inventors: Takeo Inoue (Osaka, JP); Eisaku Tanaka (Osaka, JP); Bunta Hirai (Osaka, JP); Tomohiro Kontani (Osaka, JP)
Assignee: NITTO DENKO CORPORATION
B32B27/08B32B5/18B32B7/12B32B27/065B32B27/281B32B27/286B32B27/304B32B27/308B32B27/322H10P72/7402B32B2266/025B32B2307/306B32B2307/724B32B2307/748B32B2457/00
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Quick Facts
Patent No.
US 12661877
App. No.
18/284,401
Granted
Jun 23, 2026
Kind
B2
Abstract

A member supplying sheet includes two or more protective cover members each configured to be placed on a face of an object that has an opening on the face; and a substrate sheet with the two or more protective cover members arranged on a surface thereof. The protective cover members each include a laminate including: a protective membrane shaped to cover the opening when the protective cover member is placed on the face; and a carrier film. The substrate sheet includes a substrate layer and an adhesive layer laminated on the substrate layer. The carrier film is adhered to the substrate layer via the adhesive layer. The surface free energy of the carrier film on a surface thereof on the side closer to the substrate sheet is 20 mJ/m 2 or more. The adhesive layer has a tack force of 100 mN/mm 2 or less.

Claims (16)

1 . A member supplying sheet for supplying protective cover members, the member supplying sheet comprising:

two or more protective cover members each configured to be placed on a face of an object that has an opening on the face; and

a substrate sheet with the two or more protective cover members arranged on a surface thereof, wherein

the protective cover members each include a laminate including: a protective membrane shaped to cover the opening when the protective cover member is placed on the face; and a carrier film joined to a peripheral portion of the protective membrane,

the substrate sheet includes a substrate layer and an adhesive layer laminated on the substrate layer,

the carrier film is adhered to the substrate layer via the adhesive layer,

a surface free energy of the carrier film on a surface thereof on a side closer to the substrate sheet is 20 mJ/m 2 or more, and

the adhesive layer has a tack force of 100 mN/mm 2 or less.

2 . The member supplying sheet according to claim 1 , wherein the tack force is 20 mN/mm 2 or more.

3 . The member supplying sheet according to claim 1 , wherein, on the surface of the substrate sheet, the two or more protective cover members are arranged with an interval of 0.05 mm or more and 5.0 mm or less between the protective cover members.

4 . The member supplying sheet according to claim 1 , wherein the adhesive layer is an ultraviolet curable adhesive that has been cured by ultraviolet light irradiation.

5 . The member supplying sheet according to claim 1 , wherein the protective membrane has air permeability in its thickness direction.

6 . The member supplying sheet according to claim 1 , wherein the protective membrane includes a polytetrafluoroethylene membrane.

7 . The member supplying sheet according to claim 1 , wherein the carrier film includes at least one selected from the group consisting of polyimides, polyvinylidene fluoride, polyethersulfone, and polyphenylene sulfide.

8 . The member supplying sheet according to claim 1 , wherein the laminate further includes a cover film that is on a side opposite to the carrier film with respect to the protective membrane and covers the protective membrane.

9 . The member supplying sheet according to claim 1 , wherein the protective cover members are members for a micro electro mechanical system (MEMS) as the object.