further emphasis on make sure adviser has FUNDING SECURED. a red flag for any research group is if they do not have lunch or dinner group meetings due to cutting costs. if u visit and there are no meals at group meeting, figure out if its due to scheduling conflict (e.g. student classes) or if its due to money issues.
semiconductors especially is a COST INTENSIVE research field in academia. for example, photolithography and e-beam lithography tools can easily charge $100/hr to run. u never want to be in a lab where u have to be stingy with acetone or clean wipes due to a poorfag professor. wait for the cold war with china so DoD can gib us some more funding.