David A Culbertson

US Patent:

7339203, Mar 4, 2008

Filed:

Dec 22, 2005

Appl. No.:

11/317340

Inventors:

Emmanuel Saucedo-Flores - Jalisco CP, MX
David M. Culbertson - Tempe AZ, US

Assignee:

Semiconductor Components Industries, L.L.C. - Phoenix AZ

International Classification:

H01H 29/32
H01L 21/332

US Classification:

257107, 257115, 257157, 257E29036, 257E29037, 438 48, 438133

Abstract:

A thyristor and a method for manufacturing the thyristor that includes a gate region extending from the first major surface into a semiconductor substrate and an anode region extending from the second major surface into the semiconductor substrate. A cathode region extends into a portion of the gate region. Optionally, enhanced doped regions extend into the gate and anode regions. A mesa structure having a height His formed from the first major surface and a mesa structure having a height His formed from the second major surface. The gate region extends under the first major surface of the semiconductor substrate and it extends vertically into the semiconductor substrate a distance that is greater than height H. The anode region extends under the second major surface of the semiconductor substrate and it extends vertically into the semiconductor substrate a distance that is greater than height H.

US Patent:

59201134, Jul 6, 1999

Filed:

Jul 25, 1997

Appl. No.:

8/900658

Inventors:

Hin Kooi Chee - Seremban NS, MY
Chee Hiong Chew - Seremban NS, MY
Hou Boon Tan - Seremban NS, MY
Robert J. McLaughlin - Phoenix AZ
David M. Culbertson - Tempe AZ
Alex J. Elliott - Tempe AZ
Keng Guan Quah - Gilbert AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01L 23495

US Classification:

257666

Abstract:

A leadframe (1) includes a main frame having longitudinal outer rails (4) and a number of sub-frame (8) separated from the main frame by a slit (6) extending around at least part of the perimeter of the sub-frame (8). A plurality of flag portions (2), on which a semiconductor die is to be mounted, extend from the mainframe and a plurality of lead portions (12) extend from the sub-frame (8) towards the flag portions (2). The sub-frame (8) is bent twice in a zig-zag fashion so as to be in a plane parallel to that of the main frame so that the corresponding flag and lead portions overlap without affecting the dimensions of the outer edge portion of the main frame.