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:
Dec. 04, 2007
Filed:
Jan. 17, 2006
Huo-lu Tsai, Shangfeng Village, Daya Hsiang, Taichung Hsien, TW;
Huo-Lu Tsai, Shangfeng Village, Daya Hsiang, Taichung Hsien, TW;
Other;
Abstract
A printed circuit board with thin film switches for a keyboard including an upper board having multiple circuit lines, an insulating separation defining multiple through holes, a lower board having multiple circuit lines and multiple thin film switches mounted on the upper and lower boards. The thin film switch has two thin film conductive elements respectively formed on the upper and lower boards and correspond to one of the through holes in the insulating separation. Each thin film conductive element has a center conductor, at least two outer conductors formed adjacent to the center conductor, and at least two conductive lines connected to the center and outer conductors. With such an arrangement, the areas of the center and outer conductors will be reduced, surfaces of the conductors are even in the curing procedure of fabricating upper or lower board to keep a stable touching sensitivity.