Back to results
US 12,690,128 B2Granted
Substrate for printed circuit board and printed circuit board
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Printed Circuits, Inc.
InventorsYoshio Oka, Kazuhiro Miyata, Motohiko Sugiura, Satoshi Kiya, Koji Nitta
Life of this patent
Estimating the term…
Abstract
A substrate for a printed circuit board includes a base film having a main surface and an electrically conductive layer disposed on the main surface. The base film is made of a fluororesin. The electrically conductive layer is a layer including a plurality of electrically conductive particles bonded together. An amount of nitrogen present in the main surface is 0.2 atomic percent or more.
Claims12
A substrate for a printed circuit board, the substrate comprising:
- a base film having a main surface;
- and
- an electrically conductive layer disposed on the main surface,
- wherein the base film is made of a fluororesin containing a filler made of silica particles,
- wherein the electrically conductive layer is a layer including a plurality of electrically conductive particles bonded together, and
- wherein an amount of nitrogen present in the main surface is 0.2 atomic percent or more,
- wherein the base film includes a fluororesin layer between the filler and the electrically conductive layer,
- wherein, in a cross section orthogonal to the main surface, the fluororesin layer has a predetermined range of distance between the filler and the electrically conductive layer, and a total length of the fluororesin layer between the filler and electrically conductive layer in a direction parallel to the main surface within the range of the distance between the filler and the electrically conductive layer is 5% or more of an entire length of the main surface.
5 more elements
A printed circuit board comprising:
- a base film having a main surface;
- and
- a wire disposed on the main surface,
- wherein the base film is made of a fluororesin containing a filler made of silica particles,
- wherein the wire includes an electrically conductive layer disposed on the main surface,
- wherein the electrically conductive layer is a layer including a plurality of electrically conductive particles bonded together,
- wherein the base film includes a fluororesin layer between the filler and the electrically conductive layer,
- wherein, in a cross section orthogonal to the main surface, the fluororesin layer has a predetermined range of distance between the filler and the electrically conductive layer, and a total length of the fluororesin layer between the filler and electrically conductive layer in a direction parallel to the main surface within the range of the distance between the filler and the electrically conductive layer is 5% or more of an entire length of the main surface, and
- wherein an amount of nitrogen present in the main surface is 0.2 atomic percent or more.
6 more elements
Dependencies are inferred from the claim text.