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:
Jul. 21, 1998
Filed:
Nov. 27, 1996
Kirk Alan Martin, Aptos, CA (US);
Richard A Kanishak, Danville, CA (US);
Nisene Technology Group, Soquel, CA (US);
Abstract
An apparatus and method for selectively etching an encapsulant forming a package of resinous material around an electronic device includes a source of etchant solution and an etching assembly including an etch plate and a movable cover, the etch plate and cover forming an etching chamber. An etch head is supported by the etch plate and the electronic device package is mountable in the chamber on the etch head. In a first mode of operation a displacement pump pumps a first quantity of etchant solution into the etch head and in a second mode of operation the displacement pump agitates at least part of the first quantity of etchant solution repeatedly into and out of an etched cavity formed on an exterior surface of the electronic device package by reaction of the etchant solution with the resinous material. A waste reservoir and a waste outlet extending from the etch head to the reservoir is also provided. The etch head is easily removable from the etch plate by removal of an etch head retainer.