Patent ID: 6055723
Filing Date: 2000-05-02
Classification: H01L,Y10T

Abstract:
A method for forming an electrical contact to a high temperature superconductor (HTS) circuit comprisingproviding a superconductor circuit having a first surface and a circuit contact on said first surface;applying an amorphous fluoropolymer material such as amorphous copolymer based on 2,2-bistrifluoromethyl-4,5-difluoro-1,3dioxole with other fluorine-containing monomers on said first surface and over said circuit contact to a thickness sufficient to protect said HTS circuit from damage during subsequent processing;selectively creating a via in said fluoropolymer material exposing said circuit contact;applying an adhesion layer into said via adhering to said circuit contact;applying a diffusion barrier into said via adhering to said adhesion layer; and,applying a solder bump to said diffusion barrier in such a fashion as to create an electrically conductive path between said solder bump and said circuit contact.