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. 23, 2003
Filed:
Jan. 08, 2002
Chien-Hung Liu, Taipei Hsien, TW;
Jian-Chiun Liou, Kaohsiun Hsien, TW;
Charles C. Chang, Hsinchu, TW;
Je-Ping Hu, Hsinchu, TW;
Chun-Jung Chen, Yunlin Hsien, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A driver transistor structure of an inkjet print head chip and the method for making the same. Having several body contacts distributed all over the source of an active region of a large area MOSFET (Metal Oxide Semiconductor Field Effect Transistor), an equivalent R from the MOSFET channel to the body contact is greatly diminished as the distance between them is reduced, thereby preventing the occurrence of a secondary breakdown. Since the body contact is installed inside the active region without defining in advance a body contact region and making the body contact in the field oxide layer outside the active region, about 20% of the driver transistor structure can be saved to lower the average manufacturing cost of each chip.