Patent ID: 7144796

Claim:
A method of producing a semiconductor component in a semiconductor substrate, comprising steps: a) forming a first well region having a first conductivity type and forming a second well region having a second conductivity type opposite said first conductivity type respectively in said semiconductor substrate; b) forming at least one trench in said semiconductor substrate; and c) forming and electrically contacting active regions in said semiconductor substrate; wherein said forming of said first and second well regions in said step a) comprises steps: a1) implanting a first well dopant into a first portion of said first well region and implanting a second well dopant into a second portion of said second well region; a2) diffusing said first well dopant from said first portion partially farther into said first well region and diffusing said second well dopant from said second portion partially farther into said second well region by at least one first drive-in diffusion in a first high temperature drive step carried out before said forming of said at least one trench in said step b); and a3) diffusing said first well dopant farther into said first well region and diffusing said second well dopant farther into said second well region by at least one second drive-in diffusion in a second high temperature drive step carried out after said forming of said at least one trench in said step b).