US 11,212,915 B2Granted

Stretchable mounting board

AssigneeMurata Manufacturing Co., Ltd.

InventorsHayato Katsu, Keisuke Nishida, Ryo Asai, Takayuki Okada, Shinsuke Tani

Life of this patent

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Abstract

A stretchable mounting board that includes a mounting electrode section electrically connected to stretchable wiring, and solder electrically connected to the mounting electrode section. The mounting electrode section has a first electrode layer on a side thereof facing the stretchable wiring and which includes bismuth and tin, and a second electrode layer on a side thereof facing the solder and which includes bismuth and tin. A concentration of the bismuth in the first electrode layer is lower than a concentration of the bismuth in the second electrode layer, and the concentration of the bismuth in the second electrode layer is constant along a thickness direction thereof.

Claims20

Dependent claims

A stretchable mounting board comprising:

a stretchable substrate having a main surface;
a stretchable wiring disposed on the main surface of the stretchable substrate;
a mounting electrode section electrically connected to the stretchable wiring;
solder electrically connected to the mounting electrode section and including bismuth and tin;
and
an electronic component electrically connected to the mounting electrode section with the solder interposed between the electronic component and the mounting electrode,
wherein
the mounting electrode section has a first electrode layer on a side thereof facing the stretchable wiring and which includes bismuth and tin, and a second electrode layer on a side thereof facing the solder and which includes bismuth and tin, and
a concentration of the bismuth in the first electrode layer is lower than a concentration of the bismuth in the second electrode layer, and the concentration of the bismuth in the second electrode layer is constant along a thickness direction thereof.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/070,499Filed 14 Oct 2020 · continuation
Priority: JP JP2019-06797329 Mar 2019
Published: US 2021/0045236 A111 Feb 2021
Granted: 28 Dec 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

A61B 5/263
Bioelectric electrodes therefor: characterised by the electrode materials
H05K 1/0283
Bendability or stretchability details: stretchable printed circuits
H05K 1/0393
Use of materials for the substrate: flexible materials
H05K 1/111
Printed elements for providing electric connections to or between printed circuits: pads for surface mounting, e.g. lay-out