Protective cover member and member supplying sheet

Patent metadata

Field	Value
Publication number	US-2023108896-A1
Application number	US-202117910229-A
Country	US
Kind code	A1
Filing date	Mar 11, 2021
Priority date	Mar 18, 2020
Publication date	Apr 6, 2023
Grant date	—

Abstract

A provided protective cover member is a protective cover member configured to be placed on a face of an object, the face having an opening. The protective cover member includes a laminate, and the laminate includes: a protective membrane having a shape configured to cover the opening when the member is placed on the face; and an adhesive agent layer. The adhesive agent layer includes a cured adhesive layer of a silicone adhesive agent composition including an addition-curable silicone adhesive agent. The above protective cover member is a member reducing deformation thereof and peeling thereof from a placement face at high temperatures, for example, in reflow soldering.

First claim

1 . A protective cover member,
the protective cover member being configured to be placed on a face of an object, the face having an opening, the protective cover member comprising a laminate, wherein the laminate includes: a protective membrane having a shape configured to cover the opening when the member is placed on the face; and an adhesive agent layer, and the adhesive agent layer includes a cured adhesive layer of a silicone adhesive agent composition including an addition-curable silicone adhesive agent.

2 . The protective cover member according to claim 1 , wherein the silicone adhesive agent composition includes the addition-curable silicone adhesive agent as a main component.

3 . The protective cover member according to claim 1 , wherein the silicone adhesive agent composition does not include a peroxide-curable silicone adhesive agent.

4 . The protective cover member according to claim 1 , wherein the cured adhesive layer has a gel fraction of 25 to 65 weight %.

5 . The protective cover member according to claim 1 , wherein the adhesive agent layer and/or the cured adhesive layer is in contact with the protective membrane.

6 . The protective cover member according to claim 1 , wherein the adhesive agent layer and/or the cured adhesive layer forms a joining surface to be joined to the face of the object.

7 . The protective cover member according to claim 1 , wherein
the adhesive agent layer includes a first adhesive agent layer and a second adhesive agent layer, and the laminate includes the first adhesive agent layer positioned on a first principal surface side of the protective membrane and the second adhesive agent layer positioned on a second principal surface side of the protective membrane.

8 . The protective cover member according to claim 1 , wherein the adhesive agent layer includes an adhesive tape including a substrate and the cured adhesive layer placed on at least one surface of the substrate.

9 . The protective cover member according to claim 8 , wherein the adhesive tape is a double-sided adhesive tape.

10 . The protective cover member according to claim 8 , wherein the substrate includes a heat-resistant resin.

11 . The protective cover member according to claim 1 , wherein the protective membrane has gas permeability in a thickness direction of the protective membrane.

12 . The protective cover member according to claim 1 , wherein the protective membrane includes a polytetrafluoroethylene membrane.

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

14 . The protective cover member according to claim 1 , wherein
when viewed perpendicular to a principal surface of the protective membrane,
the adhesive agent layer is placed in a peripheral portion of the protective membrane, and
a ratio L 2 /L 1 of a length L 2 of a portion of a shortest line segment of line segments extending from a center of the protective membrane to a perimeter of the protective membrane to a length L 1 of the shortest line segment is 0.3 or less, the portion lying over the adhesive agent layer.

15 . The protective cover member according to claim 1 , being for a micro electro mechanical system (MEMS).

16 . A member supplying sheet comprising:
a substrate sheet; and at least one protective cover member placed on the substrate sheet, wherein the protective cover member is the protective cover member according to claim 1 .

Assignees

• Nitto Denko Corp

Inventors

• Kigami Hiroki
• Inoue Takeo
• Watanabe Yoshinori
• Shimizu Izumi

Classifications

• C09J2301/122

  the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape · CPC title

• C09J7/38 Primary

  Pressure-sensitive adhesives [PSA] · CPC title

• C09J2301/124

  the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape · CPC title

• H04R2201/003

  Mems transducers or their use · CPC title

• C09J2301/312

  parameters being the characterizing feature · CPC title