Products > Thermal Imaging
What's this thing on the microbolometer?
Logan:
Hi guys.
I found a metal thing on my Scott's sensor package, it's like metal stick.
Please look at the 3 pictures, they were taken by Fraser, but we have a similar model. I marked that thing with an arrow.
That thing seems only exist on some microbolometers, not all models.
Does anyone know what's that for?
Thanks.
Fraser:
From memory it is the getter firing pin that is used to improve the quality of the vacuum during production.
Fraser
Fraser:
A thread you may find interesting……
https://www.eevblog.com/forum/thermal-imaging/the-ulis-02-05-01-microbolometer-an-insight-into-teh-technology-by-fraser/
Fraser
Fraser:
The manufacturer of getters for sensitive applications such as microbolometer arrays states the use of porous getters and films that operate at room temperature. I believe these are what you find in modern microbolometers…
https://www.saesgetters.com/products-functions/applications/sensors-and-mems
I cannot see an evaporative getter being used inside a microbolometer and the exact nature of a microbolometer getter that requires an activation pin is not known to me. It is likely detailed in microbolometer research documents though.
Fraser
Fraser:
Detail of a machine used for sensor assembly, including microbolometers. It states the getter is either heat or electrical activation.
https://bseteq.com/mems-packaging/
I assume in a microbolomter the getter material may be heated using a voltage and associated current applied to the getter pin but unlike a thermionic valve, it is a more refined process that activates the getters vacuum contaminant adsorbing properties without splattering material all over the interior of the module !
Navigation
[0] Message Index
[#] Next page
Go to full version