Field-Shaping Multi-Well Avalanche Detector for Direct Conversion Amorphous Selenium


Conventional micropattern gaseous detectors were developed to improve position resolution. However, the range of radiation induced photoelectrons is micrometer to millimeter in, with gas solid-state detectors having three-orders-of magnitude shorter photoelectron range due to their much higher density. Thus, solid-state detectors yield images with substantially higher spatial/temporal resolution. Disordered solids, which are easier and less expensive to develop than single crystalline solids, have not been utilized as photon counting mode detection media because of low carrier mobility and transit-time-limited photo response.


Using a direct conversion amorphous selenium radiation detector structure, the detector is able to achieve stable avalanche multiplication gain and provides high‑density insulated wells and fielding shape. These benefits eliminate formation of field hot‑spots and high fields at a metal‑semiconductor interface.


- Lower peak value - Higher density wells - More effective in electron blocking


- Radiation Therapy - cancer Therapy - cancer Research - cell Research - Bio-Medical devices

Patent Status


Stage Of Development


Licensing Potential

Development partner,Commercial partner,Licensing

Licensing Status

Available for licensing

Additional Info Source: National Institute of Standards and Technology/Flickr,, CC0.
Patent Information:
Case ID: R8449
For Information, Contact:
Donna Tumminello
Assistant Director
State University of New York at Stony Brook
Wei Zhao
Amirhossein Goldan