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US 11,634,611 B2Granted
Sheet and composite sheet
AssigneeNitto Denko Corporation
InventorsNao Kamakura, Yuki Sugo
Life of this patent
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Abstract
A problem is to provide a sheet having a pre-sintering layer, the thickness of which following sintering is such as to be capable of relieving stresses. Solution means relate to a sheet comprising a pre-sintering layer. Viscosity at 90° C. of the pre-sintering layer is not less than 0.27 MPa·s. Thickness of the pre-sintering layer is 30 μm to 200 μm.
Claims21
A sheet comprising:
- a pre-sintering layer;
- a first release liner arranged over a first face of the pre-sintering layer;
- and
- a second release liner arranged over a second face of the pre-sintering layer,
- wherein the second face is provided opposite the first face;
- wherein thickness of the pre-sintering layer is 30 μm to 200 μm;
- wherein a viscosity at 90° C. of the pre-sintering layer is not less than 0.27 MPa·s;
- wherein the pre-sintering layer comprises metal particles;
- wherein the metal particles comprise at least one species selected from the group consisting of silver particles, copper particles, silver oxide particles, and copper oxide particles;
- wherein the metal particles are present in an amount that is 50 wt % to 98 wt % per 100 wt % of the pre-sintering layer;
- wherein the metal particles become a sintered body when temperature is increased from 80° C. to 300° C. at a temperature rise rate of 1.5° C./second and is held at 300° C. for 2.5 minutes;
- wherein the pre-sintering layer further comprises a binder which is solid at 23° C., wherein the binder comprises acrylic polymer and/or polycarbonate;
- wherein the binder is present in an amount that is 0.5 wt % to 20 wt % per 100 wt % of the pre-sintering layer;
- and
- wherein the pre-sintering layer further comprises at least one low-boiling-point binder which has a boiling point between 100° C. and 350° C. selected from the group consisting of monohydric alcohols, polyhydric alcohols, and ethers.
12 more elements
A sheet comprising a pre-sintering layer;
- and
- a dicing sheet arranged over the pre-sintering layer;
- wherein thickness of the pre-sintering layer is 30 μm to 200 μm;
- wherein a viscosity at 90° C. of the pre-sintering layer is not less than 0.27 MPa·s;
- wherein the pre-sintering layer comprises metal particles;
- wherein the metal particles comprise at least one species selected from the group consisting of silver particles, copper particles, silver oxide particles, and copper oxide particles;
- wherein the metal particles are present in an amount that is 50 wt % to 98 wt % per 100 wt % of the pre-sintering layer;
- wherein the metal particles become a sintered body when temperature is increased from 80° C. to 300° C. at a temperature rise rate of 1.5° C./second and is held at 300° C. for 2.5 minutes;
- wherein the pre-sintering layer further comprises a binder which is solid at 23° C., wherein the binder comprises acrylic polymer and/or polycarbonate;
- wherein the binder is present in an amount that is 0.5 wt % to 20 wt % per 100 wt % of the pre-sintering layer;
- and
- wherein the pre-sintering layer further comprises at least one low-boiling-point binder which has a boiling point between 100° C. and 350° C. selected from the group consisting of monohydric alcohols, polyhydric alcohols, and ethers.
9 more elements
Dependencies are inferred from the claim text.