Lamination method for coating the sidewall or filling a cavity in a substrate
AssigneeInternational Business Machines Corporation
InventorsCharles R. Davis, Ronald D. Goldblatt
Life of this patent
Estimating the term…
Abstract
Method for pressing a material into a through-hole or blind-hole in a substrate. The material is disposed on the surface of the substrate. An environment is provided permitting the material to flow for example by heating the material to the glass transition temperature or above. Thereafter pressure is applied causing the material to flow, first coating the sidewall of the hole and on the continued application of pressure the material flows to completely fill the hole. The resulting substrate can have a substantially planar surface having holes with the periphery coated with or completely filled with the material. The material is preferably a thermoplastic polymeric material such as a polyimide and a perfluorinated polymer.
Claims29
A method comprising:
- providing a substrate having a substantially solvent free material layer on at least a part of a surface of said substrate, there being a cavity having a sidewall in said substrate extending at least to said layer;
- providing an environment sufficient for said material layer to flow;
- pressing said material towards said substrate causing said material layer to flow into said cavity;
- and
- said material layer first flows down said sidewall forming a coating which substantially coats said sidewall, on continued pressing of said material layer said coating thickens;
- and
- controlling said pressing to control the thickness of said coating to be less than sufficient to completely fill said cavity.
A method comprising:
- providing a substrate having a substantially solvent free material layer on at least a part of a surface of said substrate, there being a cavity having a sidewall in said substrate extending at least to said layer;
- providing an environment sufficient for said material layer to flow;
- pressing said material towards said substrate causing said material layer to flow into said cavity;
- said material layer first flows down said sidewall forming a coating which substantially coats said sidewall unit until said material reaches an obstruction in said cavity, on continued pressing of said material layer, said coating thickens;
- and
- controlling said pressing to control the thickness of said coating to be less than sufficient to completely fill said cavity.
A method comprising:
- providing a substrate having a substantially solvent free material layer on at least a part of a surface of said substrate, there being a cavity having a sidewall in said substrate extending at least to said layer;
- providing an environment sufficient for said material layer to be in a viscoelastic state permitting it to flow;
- pressing said material towards said substrate causing said material layer to flow into said cavity;
- said material layer first flows down said sidewall forming a coating which substantially coats said sidewall, on continued pressing of said material layer said coating thickens;
- and
- controlling said pressing to control the thickness of said coating to be less than sufficient to completely fill said cavity.
A method comprising:
- providing a substrate having a substantially solvent free material layer on at least a part of a surface of said substrate, there being a cavity having a sidewall in said substrate extending at least to said layer;
- providing an environment sufficient for said material layer to be in a viscoelastic state permitting it to flow;
- pressing said material towards said substrate causing said material layer to flow into said cavity;
- said material layer first flows down said sidewall forming a coating which substantially coats said sidewall until said material layer reaches an obstruction in said cavity, on continued pressing of said material layer, said coating thickens;
- and
- controlling said pressing to control the thickness of said coating to be less than sufficient to completely fill said cavity.
Dependencies are inferred from the claim text.