Patent ID: 7648898
Filing Date: 2010-01-19
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising: forming a channel of a transistor, wherein the channel has a first conductivity type; depositing a first layer of oxide on a least a portion of the channel; depositing a layer of nitride on the first layer of oxide; etching the nitride, wherein at least a portion of the layer of nitride is etched to the first layer of oxide; depositing a second layer of oxide on the layer of nitride and the first layer of oxide; planarizing the second layer of oxide to expose at least a portion of the layer of nitride; stripping at least a portion of the layer of nitride to create one or more notches and to expose at least a portion of the first layer of oxide; removing at least a portion of the first layer of oxide; and depositing a layer of polysilicon, wherein at least a portion of the layer of polysilicon is deposited into one or more notches created by stripping at least a portion of the layer of nitride.