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:
Jun. 01, 2010
Filed:
Dec. 05, 2005
Jen-kuang Fang, Pingtung County, TW;
Chung-hwa Feng, Taoyuan, TW;
Jen-Kuang Fang, Pingtung County, TW;
Chung-Hwa Feng, Taoyuan, TW;
Advanced Semiconductor Engineering, Inc., Kaohsiung, TW;
Abstract
A method of forming pre-solders on a substrate is provided. Firstly, a substrate is provided. The substrate includes an upper surface and a lower surface. There are several metal circuits and a solder mask both on the upper and the lower surfaces. Each solder mask covers parts of the corresponding metal circuits and parts of the corresponding surface for exposing parts of several pads of the corresponding metal circuits. Then, a patterned photo-resist film is formed on the upper surface. The patterned photo-resist film has several openings for exposing the upper-surface pads. Afterwards, several metal materials are formed in the opening by printing. Thereon, the metal materials are reflown to form several pre-solders on the upper-surface pads. Finally, the patterned photo-resist film is removed.