Process Development Engineer Interview Questions | Glassdoor

Process Development Engineer Interview Questions

104

Process development engineer interview questions shared by candidates

Top Interview Questions

Sort: RelevancePopular Date

Can Si be used to make LEDs ?

3 Answers

Si can be used as a substrate in LEDs, but it cannot be used in the p-n junction because the bandgap energy is too small to produce visible light.

Technically: Yes. But it has an indirect bandgap, so you really wouldn't want to.

The energy bandgap of Si at room temperature is 1.12eV. Since the relationship between photon energy and wavelength is E(eV)=1.24/wavelength(micrometers), one can calculate that Si could emit a ligth in infrared optical spectrum: wavelength=1.24/1.12eV=1.11 micrometers. BUT, Si is indirect semiconductor! And therefore does not emit significant amounts of light due to the requirement of momentum conservation in optical transitions.

Estimate the number of flat tyres in the US in a year?

3 Answers

If a glass of water is half full and you put ice in it, when ice melts, the water level will increase of decrease or remain constant? Give scientific reason.

2 Answers

How many barbers to cut men's hair in a city of 2 million people?

2 Answers

The panel interview make it very difficult to concentrate. Several ppl attacked the candidates at once. They ask a lot of technical question on how you overcome difficult projects that you encountered. They dont offer water, breaks or comfortable conference room

2 Answers

What would be the time mix that I would prefer , Computer / Document , vs out in the plant .

1 Answer

What is an LED?

1 Answer

If I have two sons whose ages when added together is 20 and when subtracted is 1, what are their ages?

1 Answer

From your experience in resume, how did you troubleshoot the problem?

1 Answer

what do you know about Cree ?

1 Answer
110 of 104 Interview Questions