tag:blogger.com,1999:blog-19092890.post8931007539915097784..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: UV-Transparent Coating for Image SensorsVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-19092890.post-29184259927353321772011-03-03T03:15:53.094+02:002011-03-03T03:15:53.094+02:00I meant they perform well down to at least 100nm.I meant they perform well down to at least 100nm.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-7098723906571035942011-03-03T03:15:09.397+02:002011-03-03T03:15:09.397+02:00Silicon imagers can deliver reflection-limited per...Silicon imagers can deliver reflection-limited performance 100nm with Delta doping (e.g. QE>30%). Delta doping is an MBE process.<br /><br />Enhanced UV can also be had with boron implant and laser anneal or in-situ doped poly, but it's not as good as delta doping.<br /><br />These are all extra steps not typically incorporated with silicon imagers. But they are well established.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-85679291806356562192011-02-05T15:08:17.970+02:002011-02-05T15:08:17.970+02:00The absorption length is long in IR, in UV it'...The absorption length is long in IR, in UV it's very short.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-36053848078368964682011-02-05T13:34:22.096+02:002011-02-05T13:34:22.096+02:00Take into consideration that absorption length is ...Take into consideration that absorption length is a few mm in the uv...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-33005445713496177322011-02-04T22:54:07.120+02:002011-02-04T22:54:07.120+02:00Spectroscopic devices have always worked down to 1...Spectroscopic devices have always worked down to 190 nm. The problem is not that the UV is not absorbed, it is that it is absorbed very close to the surface so in most devices the generated charge recombines without being captured for readout.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-32297419711661566122011-02-04T18:40:44.375+02:002011-02-04T18:40:44.375+02:00Last I checked, the back thinned scientific CCDs (...Last I checked, the back thinned scientific CCDs (whish as far as I know are still made of silicon) managed to absorb below 200nm.<br /><br />Silicon w/o glass does fine under 400nm.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-34026741313412554212011-02-04T04:02:15.577+02:002011-02-04T04:02:15.577+02:00-what applications would like to see UV?
-was unde...-what applications would like to see UV?<br />-was under the impression that silicon could not absorb wavelengths under 400um anyway? not correct?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-38548577469151588692011-02-03T00:05:53.418+02:002011-02-03T00:05:53.418+02:00Any data on stability of the coating under UV ligh...Any data on stability of the coating under UV light? Buildup of positive charges on the layer with a certain dose of light below 250 nm?Guy Meynantshttps://www.blogger.com/profile/08681499907325206298noreply@blogger.com