Including Isolation Step (437/61) Patents (Class 438/FOR221)
Foreign Patent Art Collections
Using vertical dielectric (air-gap/insulator) and horizontal pn junction (437/64) (Class 438/FOR224)
- By diffusion from upper surface only (437/75) (Class 438/FOR235)
- By up-diffusion from substrate region and down diffusion into upper surface layer (437/76) (Class 438/FOR236)
- By etching and refilling with semiconductor material having diverse conductivity (437/78) (Class 438/FOR238)
- Using polycrystalline region (437/79) (Class 438/FOR239)
There are no patents to show for this class.