Tag: Semiconductors

Stop Making Things!

 

That seems to me the message…or at least one message…of the tax/energy/economics plan introduced by Biden and supported by Joe Manchin. From the WSJ:

Evidence is emerging that the new Schumer-Manchin 15% minimum tax on corporate-book income is especially harmful to U.S. manufacturing firms. An analysis by Congress’s Joint Committee on Taxation (JCT), which is hardly a nest of supply-siders, found that 49.7% of the tax would hit U.S. manufacturers.

Questions About the Semiconductor Bill

 

I just saw a story from Reuters (here) that a “sweeping semiconductor industry bill” has advanced in the Senate, and could be passed by both the Senate and House within the week.  The story reports that the bill “provides about $52 billion in government subsidies for U.S. semiconductor production as well as an investment tax credit for chip plants estimated to be worth $24 billion.”

The stated justification, in the Reuters story, is “to make the domestic industry more competitive with China.”

How to Build a Computer 37: CVD II, This Time It’s Personal

 

Last time, if you’ll recall, I discussed the basic idea of a chemical vapor deposition system, and described how you’d use it to deposit silicon onto your wafer. Today we’re following rather directly from that post, where we answer some important questions. Questions like “What if I don’t want to put down silicon? What other things can you offer me?” Well, for starters

SiCl4(g) + 2H2(g) + O2(g) —> SiO2(s) + 4HCl(g) ~900 C

How to Build a Computer 36: Chemical Vapor Deposition

 

No matter how much fun you’re having etching silicon, applying and stripping photoresist, or implanting ions, sooner or later you’re going to have to actually put down some lines. Gotta build a circuit eventually. Chemical Vapor Deposition (CVD) is one of the main ways this gets done. Let’s have a look at what we’re doing, shall we?

If I had known I was going to use this picture at least three times I might have put a little more effort into the sketching.