Member supplying sheet

Patent metadata

Field	Value
Publication number	US-12214575-B2
Application number	US-202117790851-A
Country	US
Kind code	B2
Filing date	Jan 8, 2021
Priority date	Jan 9, 2020
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

A member supplying sheet provided includes: a protective cover member configured to be placed on a face of an object to prevent a foreign matter from entering an opening of the face; and a substrate sheet having a surface where the protective cover member is placed. The protective cover member includes a laminate including: a protective membrane having a shape configured to cover the opening when the protective cover member is placed on the face; and an adhesive layer. The protective cover member is placed on the surface of the substrate sheet via the adhesive layer. The member supplying sheet is suitable for supplying the protective cover member to a device that picks up the protective cover member in a state where the substrate sheet is pushed up from a back side of the substrate sheet, the back side being opposite to the surface.

First claim

The invention claimed is:

1. A member supplying sheet, the member supplying sheet being for protective cover member supply and comprising:
one or more protective cover members each configured to be placed on a face of an object to prevent a foreign matter from entering an opening of the face; and
a substrate sheet having a surface where the one or more protective cover members are placed, wherein
the protective cover member comprises a laminate including: a protective membrane having a shape configured to cover the opening when the protective cover member is placed on the face; and an adhesive layer,
wherein the protective membrane has gas permeability in a thickness direction of the protective membrane, the gas permeability being 100 sec/100 mL or less as expressed in terms of a Gurley air permeability obtained according to a Gurley Method B of gas permeability measurement specified in JIS L 1096,
the protective membrane includes a stretched porous polytetrafluoroethylene membrane, and wherein, in a direction in which the protective membrane and adhesive layer are stacked, opposing side edges of the adhesive layer are aligned with opposing side edges of the protective membrane,
the protective cover member is placed on the surface of the substrate sheet via the adhesive layer, and
the substrate sheet has the following property A and property B:
A: a tensile stress at 10% stretching in a tensile test is 15 N/5 mm or less in at least one in-plane direction; and
B: a peel force of the surface is 0.4 N/50 mm or less, the peel force being evaluated by a peel test in which the substrate sheet adhered to an adhesive tape via the surface is peeled off at 180° with respect to the adhesive tape.

2. The member supplying sheet according to claim 1 , wherein a joining surface of the adhesive layer is formed of an acrylic adhesive or a silicone adhesive, the joining surface being configured to be joined to the surface.

3. The member supplying sheet according to claim 1 , wherein the surface of the substrate sheet is a release treatment surface treated with silicone or fluorosilicone.

4. The member supplying sheet according to claim 1 , wherein
a joining surface of the adhesive layer is formed of an acrylic adhesive, the joining surface being configured to be joined to the surface, and
the surface of the substrate sheet is a release treatment surface treated with silicone.

5. The member supplying sheet according to claim 1 , wherein
a joining surface of the adhesive layer is formed of a silicone adhesive, the joining surface being configured to be joined to the surface, and
the surface of the substrate sheet is a release treatment surface treated with fluorosilicone.

6. The member supplying sheet according to claim 1 , wherein the adhesive layer is a substrate-less double-sided adhesive tape.

7. The member supplying sheet according to claim 1 , wherein the protective membrane has an area of 175 mm 2 or less.

8. The member supplying sheet according to claim 1 , wherein the laminate further includes a cover film positioned opposite to the adhesive layer with respect to the protective membrane and covering the protective membrane.

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

10. The member supplying sheet according to claim 1 , being a member supplying sheet for supplying the protective cover member to a pickup device that picks up the protective cover member from the substrate sheet in a state where the substrate sheet is pushed up from a back side of the substrate sheet, the back side being opposite to the surface.

Assignees

• Nitto Denko Corp

Inventors

• Kigami Hiroki

Classifications

• B32B2307/54

  Yield strength; Tensile strength · CPC title

• B32B27/30

  comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B3/085

  spaced apart pieces on the surface of a layer · CPC title

• B32B27/322 Primary

  comprising halogenated polyolefins, e.g. PTFE · CPC title