Silicon wafers
Which is closest to the standard thickness of a 300 mm silicon wafer?
- AAbout 5 mm
- BAbout 100 µm
- CAbout 775 µm
Show answer and explanation
Answer: C. About 775 µm
The standard thickness of a 300 mm wafer is about 775 µm. Larger wafers are thicker to prevent sagging and breakage under their own weight (200 mm wafers are about 725 µm). Depending on the product, the back is ground in the back-end process to a few tens of µm.