Composite of metal member and resin mold, and metal member for formation of composite with resin mold

Patent metadata

Field	Value
Publication number	US-2017320247-A1
Application number	US-201715656679-A
Country	US
Kind code	A1
Filing date	Jul 21, 2017
Priority date	Jan 23, 2015
Publication date	Nov 9, 2017
Grant date	—

Abstract

A composite including a metal member and a resin mold formed jointed to a surface of the metal member is provided, wherein the metal member has a roughened portion in a joint to the resin mold in the surface, and in a specific interface region including a joint interface between the roughened portion and the resin mold, the average volume in a unit area of voids between the roughened portion and the resin mold is 0.05 μm 3 or smaller per 1 μm 2 of a plane generally parallel to the joint interface, and the maximum dimension of the void is 1000 nm or smaller.

First claim

What is claimed is:

1 . A composite comprising a metal member and a resin mold formed jointed to a surface of the metal member, wherein
the metal member has a roughened portion in a joint to the resin mold in the surface, and in a specific interface region including a joint interface between the roughened portion and the resin mold, an average volume in a unit area of a void between the roughened portion and the resin mold is 0.05 μm 3 or smaller per 1 μm 2 of a plane generally parallel to the joint interface, and a maximum dimension of the void is 1000 nm or smaller.

2 . The composite of a metal member and a resin mold according to claim 1 , wherein an arithmetic average roughness of the roughened portion is 0.13 μm to 100 μm.

3 . The composite of a metal member and a resin mold according to claim 2 , wherein
the metal member has an unroughened region without the roughened portion in a part of the surface, and an abundance ratio of oxygen in the roughened portion is higher than an abundance ratio of oxygen in the unroughened region.

4 . The composite of a metal member and a resin mold according to claim 3 , wherein the abundance ratio of oxygen element in the roughened portion is 1.3 times or more of an abundance ratio of oxygen in the unroughened region.

5 . The composite of a metal member and a resin mold according to claim 1 , wherein the roughened portion has a collection of dotted uneven portions.

6 . The composite of a metal member and a resin mold according to claim 5 , wherein the roughened portion includes a region within 100 μm from an outer periphery of each of the dotted uneven portions.

7 . The composite of a metal member and a resin mold according to claim 5 , wherein a depth of each of the dotted uneven portions is 100 nm or more and 50 μm or less.

8 . The composite of a metal member and a resin mold according to claim 5 , wherein a density of the dotted uneven portions is 20 to 2000 portions/mm 2 .

9 . The composite of a metal member and a resin mold according to claim 5 , wherein a diameter of each of the dotted uneven portions is 200 μm or smaller.

10 . The composite of a metal member and a resin mold according to claim 5 , wherein the roughened portion is present in a roughening pattern with the dotted uneven portions continuously disposed.

11 . The composite of a metal member and a resin mold according to claim 5 , wherein
the metal member has a roughened region including the roughened portion in a part of the surface, and a minimum value of a width of the roughened region is 200 μm or larger.

12 . The composite of a metal member and a resin mold according to claim 1 , wherein
the composite further includes a functional part in the resin mold, and the roughened portion is formed in a manner such that the roughened portion at least surrounds the functional part.

13 . The composite of a metal member and a resin mold according to claim 1 , wherein the composite has a closed space in the resin mold, and the closed space includes a surface of the metal member not covered with the resin mold.

14 . A metal member comprising a roughened portion for jointing to a resin mold in a part of a surface to form a composite, wherein
when the resin mold is jointed to the surface of the metal member in a manner such that the resin mold includes the roughened portion, in a specific interface region including a joint interface between the roughened portion and the resin mold, an average volume in a unit area of voids between the roughened portion and the resin mold is 0.05 μm 3 or smaller per 1 μm 2 of a plane generally parallel to the joint interface, and a maximum dimension of the void is 1000 nm or smaller.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Aizawa Hideki
• KOIZUMI Shouji
• Ookubo Michio
• Shibata Kunio
• Hashimoto Makoto

Classifications

• H10W74/129

  forming a chip-scale package [CSP] · CPC title

• H10W70/40

  Leadframes · CPC title

• H10W42/121

  protecting against mechanical damage (H10W76/00, H10W74/00 take precedence) · CPC title

• H10W74/127

  characterised by arrangements for sealing or adhesion · CPC title

• H10W74/016

  using moulds · CPC title