General > General Technical Chat
Photodiode array cost
RoscoeP:
Hi all,
Looking at getting a custom monolithic p-i-n photodiode array produced. Does anyone know ballpark NRE costs for this?
I don't want to waste a company's time going through specs only to find out my budget is completely unreasonable.
It would be a fairly simple linear array with 10 elements around 1 x 0.5mm each, common cathode, PDIP package.
Any advice much appreciated!
coppercone2:
I think the lab equipment required depending on technique is 5-30 million or so for a infrared device prototype in a place that's like 'relatable' to industry (not a mad scientist in a barn using whatever means necessary, aka standard/easy)
I would not expect a low price for labor because its optics and that always gets hiked
Like do you have a basic idea for what it should be, or do you need ALL semiconductor/IC aspects designed? If you just need a technician to run your 'blueprints' and maybe adjust a few parameters for the machines thats one thing (i.e. you are like a pHd in optics that needs a chip made that you designed), if you want someone to give you a device with a data sheet that you just wanna use like a black box, that's gonna be another game.
And then do you need your device like mapped, tested, etc? (i.e. commercial shit related to defects etc)
like if you just want a barely tested bare die that you designed and are gonna bond and package yourself, you might get out 'alive', but if its the other thing, I think you will need some big money
Kleinstein:
A first point would be to look for what is already commercially avaiable. Usually one has some room to adapt the optics a little and a few extra elements may be an option if a standard part.
Chances are the specs of the custon diode array would be similar to comparable stock parts - so you may have to look at the specs anyway.
In principle the extra costs would not have to be very high, as the photodiode would not need a high resolution mask. It is more a thing of an old process, but with a high purity substrate. At the university I remember cost for a mask "set" (likely 2 masks) of some $300 for experimental chips ( in this case coarse dimensions MEMS, but this should not make a big difference).
The mask design should not be complicated - more like scale / adapt a genral design.
How much the companies actually charge is a business question and to tell. This may also vary quite a bit between companies - so you likely have to just ask for a quote to get an idea.
daqq:
For a weird sensor I've seen standard photodiode dies precisely positioned onto a substrate and then wirebonded. Wouldn't that be an alternative?
Or something commercial like this?
https://www.hamamatsu.com/content/dam/hamamatsu-photonics/sites/documents/99_SALES_LIBRARY/ssd/s8558_kmpd1062e.pdf
Someone:
--- Quote from: daqq on June 16, 2022, 08:09:07 am ---Or something commercial like this?
--- End quote ---
If someone is asking about custom parts on an open forum, its usually a sign they don't meet the usual prerequisites of:
needing a volume large enough to have contacts with suppliers
or
have access to research labs to assemble/build something close enough
OP, go back to the drawing board with available off the shelf parts, then come back and explain why existing options won't work.
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