commit b2093e536210e37363426073e07d36091d06cbed
parent f8d90226674a117503b76854878f827412cdbb30
Author: viznut_web <viznut_web@web>
Date: Sat, 25 Jun 2022 18:22:18 +0200
empty web commit
Diffstat:
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/IC.mdwn b/IC.mdwn
@@ -16,12 +16,7 @@ Types of ICs:
Making
------
-There are hobbyists who have succesfully produced ICs in
-garage-like conditions. In 2021, Sam Zeloof produced twelve
-1200-transistor chips at home (the first microprocessor had
-2300 transistors), although some second-hand special purpose
-equipment such as a maskless photolithography stepper were
-used.
+There are hobbyists who have succesfully produced ICs in garage-like conditions. In 2021, Sam Zeloof produced twelve 1200-transistor chips at home (the first microprocessor had 2300 transistors), although some second-hand special purpose equipment such as a maskless photolithography stepper were used.
DIY project information:
@@ -35,6 +30,6 @@ encapsulation). However, fabrication processes usually use
dangerous substances such as hydrogen fluoride (HF) to keep the
chip clean. Trichloroethylene (TCE) has poisoned groundwater
supplies several times, including in 1974 when a leak took
-place in the MOS Technology Pennsylvania plant. Finding
-alternatives to these substances may be more urgent than
-developing local and small-scale production.
+place in the MOS Technology Pennsylvania plant. Finding alternatives to these substances may be more urgent than developing local and small-scale production.
+
+Zeloof has been able to eliminate some aggressive chemicals such as sulfuric acid from the process. HF is still mentioned, but CF4 and CHF3 are listed as alternatives for it.
