Run Card for cmos150

Step 18.0

Process: Nitride Removal, include PCH

 

Date

Operator

1.
Dip in 25:1 HF for 2 min. to remove thin oxide 

on top of Si3N4 (sink9)

11/27/01
vorosl
2.
Etch nitride off in boiling phosphoric acid.
11/27/01
vorosl
Temperature= 130 C
Etch time= 3 hours for wafers with 1000 A nitride
Etch time= 5.5 hours for wafers with 2000 A nitride (#8-10,#14,#15)

Note: Since 6? sink was not available for this process old lab (sink432b) was utilized.

3.
Measure Tox on active area and PCH.
11/27/01
jcpeng
Nanospec, thin oxide program, 10x [A]
wafer
top
cent
flat
left
right
#1
303
290
290
293
278
#14
289
286
276
291
286
PCH
287
286
285
284
280