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:
Feb. 16, 1999
Filed:
May. 22, 1997
Applicant:
Inventors:
Ilan Hadar, Haifa, IL;
Avishai Shklar, Kfar Vitkin, IL;
Assignee:
Kulicke and Soffa, Investments, Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
2281805 ; 228-45 ;
Abstract
A fine pitch capillary bonding tool for making ball bonds having a consistent bonded ball size even though the air balls may vary in diameter is provided. The convential shaped bonding tool is provided with a novel ball constraining recess in the working tip. When an air ball is bonded it is forced into the constraining recess which has a shoulder portion for exerting a downward bonding force. The ball being bonded extrudes vertically into the constraining recess without laterial extrusion which would create mashed balls of varying diameter.