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. 04, 2003
Filed:
Sep. 17, 2001
Jin Yuan Lee, Hsin-chu, TW;
Ming Ta Lei, Hsin chu, TW;
Ching-Cheng Huang, Hsinchu, TW;
Chuen-Jye Lin, Ta-Tu Hsiang Taichung, TW;
Megic Corporation, Hsin-Chu, TW;
Abstract
A new method and chip scale package is provided. A point of electrical contact over a substrate is exposed through an opening created through overlying layers of passivation and polymer or elastomer, deposited over the substrate. A barrier/seed layer is deposited. A first photoresist mask exposes the barrier/seed layer where this layer overlies and is adjacent to the contact pad. The exposed surface of the barrier/seed layer is electroplated. The first photoresist mask is removed, a second photoresist mask is created to define the solder bump exposing a surface area of the barrier/seed layer not overlying the contact pad. The solder bump is created, the second photoresist mask is removed. The exposed barrier/seed layer is etched in accordance with the electroplating, reflow of the solder bump is optionally performed.