Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for forming twin well










Image Number 5 for United States Patent #5661067.

An improved twin well formation method for a semiconductor device capable of improving the latch-up characteristic in DRAM device which requires a high integration density and of improving a recess problem which occurs due to the capacitor, which includes the steps of a first step which forms an insulation film on a semiconductor substrate having a first region and a second region; a second step which forms a first temporary film on an insulation film of the first region; a third step which forms a first side wall spacer at the first temporary side wall; a fourth step which implants a first conductive ion to a substrate of a second region; a fifth step which forms a second temporary film on a substrate of the second region; a sixth step which removes the first temporary film; a seventh step which implants a second conductive ion to a substrate of the first region; and an eighth step which anneals and removes the second temporary film and the first insulation spacer.








 
 
  Recently Added Patents
Expression of dirigent gene EG261 and its orthologs and paralogs enhances pathogen resistance in plants
Micromechanical component, device for beam deflection of monochromatic light, and spectrometer
Neurostimulation system
Ion beam system and method of operating ion beam system
Methods and apparatuses for configuring and operating graphics processing units
Device and method for producing a fluidic connection between cavities
Remedy for overactive bladder comprising acetic acid anilide derivative as the active ingredient
  Randomly Featured Patents
Socket for a control panel
Portable electronic device with detachable keypad module
Electric filter, and duplexer using the same
Power amplifier system having frequency and amplifier failure compensation
Compressor control system and method
Redundant configuration method of a storage system maintenance/management apparatus
Prayer pillow with multifunctions
Solid-state imaging device
Microbial arachidonic acid (ARA) for use in marine feed
Cyclopentane aldehydes