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:
Jan. 24, 1995
Filed:
Dec. 03, 1993
Jeffrey A Chapman, Burgess Hill, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
In the manufacture of liquid crystal display devices with drive circuits and of other large area electronics devices, discharge damage of tracks (9) and other parts of a thin-film pattern (12) can result during an ion-implantation step for forming transistors (15) and doping the tracks (9). This damage is avoided by providing a discharge path (10) which is so constructed in accordance with the invention that no extra processing steps are required, and the path (10) can be retained in the manufactured device. This discharge path has along its length a series of discharge gaps (20) which separate successive thin-film regions (10, 9) of the path and so provide electrical isolation for normal operation of the device. However, during the ion implantation, charge leakage occurs across the discharge gaps (20) between the separate successive regions (10, 9) of the path so providing a continuous and controlled discharge from the pattern (12).