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:
Oct. 09, 1984
Filed:
Jun. 03, 1982
Susumu Iesaka, Tokyo, JP;
Shigenori Yakushiji, Yokohama, JP;
Abstract
A low-loss P-i-n diode includes an i-type layer consisting of first and second i-type regions formed on the cathode layer of the diode and the i-type has a thickness W.sub.i of less than 25 .mu.m. The impurity concentration of the first i-type region is higher than that of the second i-type region. To obtain a good forward-voltage V.sub.f, W.sub.i.sup.2 /.tau. is selected to be in the range of 20-200cm.sup.cm.sup.2/sec and the carrier lifetime .tau. of the i-type layer is controlled by a carrier lifetime killer with a small resistivity compensation effect which is diffused into the i-type layer. The P-i-n diode has a high reverse breakdown voltage, small forward-voltage drop and a short recovery time.