The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Dec. 29, 1998
Theodore A Khoury, Chicago, IL (US);
Mark R Jones, Mundelein, IL (US);
James W Frame, Chicago, IL (US);
Advantest Corp., Tokyo, JP;
Abstract
A production method for forming contact structures on a planar surface of a substrate. The production method includes the steps of: (a) forming a sacrificial layer on a surface of a silicon substrate, (b) forming an conductive layer made of electric conductive material on the sacrificial layer, (c) forming a photoresist layer on the conductive layer, (d) aligning a photo mask over the photoresist layer and exposing the photoresist layer with ultraviolet light through the photo mask where the photo mask including an image of the contact structures, (e) developing the image on the photoresist layer which has openings on the surface of the photoresist layer, (f) forming the contact structures made of electric conductive material in the openings by an electroplating process, (g) stripping the photoresist layer, (h) placing an adhesive tape on the contact structure, and (i) removing the sacrificial layer and the conductive layer by an etching process to separate the contact structures on the adhesive tape from the silicon substrate.