Patent ID: 9484400
Filing Date: 2016-11-01
CPC Classification: H01L

Claim Text:
1. A method of forming a super junction semiconductor device, the method comprising: forming at least a portion of a drift layer on a doped layer of a first conductivity type; implanting first dopants of a first conductivity type and second dopants of a second conductivity type into the drift layer using one or more implant masks with openings to form stripe-shaped first implant regions of the first conductivity type, stripe-shaped second implant regions of the second conductivity type in alternating order and a circumferential implant zone of the first conductivity type that encloses the stripe-shaped first and second regions, wherein the stripe-shaped second implant regions are separated from the stripe-shaped first implant regions and from the circumferential implant zone at uniform distances; performing a heat treatment for controlling a diffusion of dopants from the implant regions to form stripe-shaped first regions of the first conductivity type and stripe-shaped second regions of the second conductivity type.