diff --git a/tech.py b/tech.py
new file mode 100644
index 0000000..891c1b3
--- /dev/null
+++ b/tech.py
@@ -0,0 +1,3 @@
+from typing import Literal
+
+TechName = Literal["sky130A", "ihp-sg13g2", "gf180mcuD"]