Could you please advise me about the process of HMC451? Is it 0.15um, 0.25um or 0.5um? Or is it same as HMC462?
The HMC451 and HMC462 are fabricated on the same process, PHEMT-F.
Below is a link to the Semiconductor Qualification Test Report for this process:
You will find the two part numbers listed in the report.
For the HMC-branded products, process geometries are generally considered to be proprietary information and thus we seldom disclose them. Is there a particular reason why you have requested that information? With an understanding of why, I might be able to better help address your concerns.
As general advice, our products fabricated in PHEMT processes will contain platinum and/or palladium and, when devices containing such metals are packaged in a sufficiently hermetic manner ("hermetic"), they can become susceptible to the effects of hydrogen poisoning...sometimes seen as gain and bias currents that shift over time, among other effects or failures. Customers who use these types of devices in hermetic packages might thus need to take action to prevent such poisoning. Though mitigation of the effects of hydrogen poisoning is the customer’s responsibility and is not one of our areas of expertise, I’ve been told that the following are some commonly employed techniques:
Again, mitigation of the effects of hydrogen poisoning is not one of our areas of expertise, so I offer the above without warranty and only as a courtesy. A search of literature published by independent, academic, and/or government laboratories might help you to find specific methods and procedures that are compatible with your application and assembly processes.
I'm one of the ADI EZ support contacts who works most closely to (in) this RF/Microwave product line and would thus likely have access to the most relevant information. You could direct the same questions through other ADI channels, but I don't know that doing so would result in more detailed or insightful answers on this topic.
I hope that helps. Let me know if you have more questions.