Minimizing the effect of directly converted x-rays in x-ray imagers

US7151287B1 · kind B1 · utility

Assignee

• Cypress Semiconductor Corporation · US

Inventors

• Danny Scheffer · Hulst, NL
• Tom A. Walschap · Bornem, BE

Key dates

• Filing date: Mar 25, 2005
• Grant date: Dec 19, 2006
• Expiry date: Apr 16, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F39/1898

Abstract

In one embodiment, an image sensor for an x-ray imager includes a photodiode and a readout circuit. A deep well formed below the readout circuit may be configured as a diode to drain away parasitic electrons, which would otherwise induce noise in images. The parasitic electrons may be drained away to a power supply or a measuring circuit for dosimetrie purposes, for example.