Patent ID: 7772075
Filing Date: 2010-08-10
Classification: H01L

Abstract:
1. A method for making a LDMOS transistor, comprising: forming an n-well of said LDMOS transistor within a semiconductor wafer; forming isolation regions within said n-well; forming a patterned mask over said semiconductor wafer; implanting p-type dopants at a location of a p-body region into said n-well; implanting n-type dopants into said n-well; removing said patterned mask; performing a thermal process that diffuses said implanted p-type dopants, diffuses said implanted n-type dopants, and grows a layer of oxide over a surface of said semiconductor wafer; forming a gate electrode coupled to said layer of oxide; and forming source and drain regions within said n-well; wherein said n-type dopants are implanted at an angle that is greater than an angle that is used to implant said p-type dopants.