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. 17, 1992
Filed:
Apr. 18, 1991
Ginetto Addiego, Berkeley, CA (US);
Francois J Henley, Los Gatos, CA (US);
Photon Dynamics, Inc., Milpitas, CA (US);
Abstract
A laser-based repair system provides for material removal and deposition using a repair tool having a first laser operating at a high power for cutting signal lines and operating at a lower power for ablating a target repair area in conjunction with a liquid dispensing apparatus for application of the liquid solution in a target area, and a second laser for decomposing the liquid solution in an applied layer prior to the ablation of material in the target repair area. Various repair processes can be undertaken. The invention allows high-speed material deposition and removal on a surface. In a specific embodiment of the invention, the liquid solution used is a palladium acetate and a solvent or other metallo-organic solution which is capable of pyrolytic reaction and decomposition to an electrically conductive residue. A liquid applicator or dispensing apparatus is provided which is suited to applying fine traces of liquid without clogging. An optical head is provided which project beams from a plurality of lasers and surface illumination along a common axis with an optical viewing system for lighting a target workpiece for observing the repair in progress. The invention is particularly useful in the repair of large matrices, such as liquid crystal display panels.