4.3. Mask Layer Numbering¶
The following table matches the mask or reticle layer number to the drawn/generated layers.
Mask layers¶ Mask#
Layer Name
Description
Drawn/Generated
Digitized Polarity
Output GDS II #
N-Value
10
COMP
COMP
Drawn + Generated
Chrome
22
1
11
AD
Planarization Aid
Generated
Clear
15
0
5
Nwell
NWELL
Drawn + Generated
Clear
21
0.25
6
DNWELL
Deep Nwell
Drawn
Clear
12
0.25
18
LVPWELL
LVPWELL
Drawn + Generated
Chrome
204
0.25
64
TP
3.3V PMOS Vt Implant
Generated
Clear
10
0.25
61
TN
3.3V NMOS Vt Implant
Generated
Clear
47
0.25
38
Dualgate
Dualgate
Drawn
Chrome
55
1
60
Poly2
POLY2
Drawn
Chrome
30
1
1L
MVNVT
5V or 6V NLDD
Generated
Clear
205
0.25
2E
MVPVT
MTP Cell Implant
Generated
Clear
206
0.25
65
Nplus
Nplus Implant
Drawn
Clear
32
0.5
67
ESD
ESD implant
Drawn
Clear
24
0.25
70
Pplus
Pplus Implant
Drawn + Generated
Clear
31
0.5
63
Resistor
Resistor
Drawn
Clear
62
0.25
68
SAB
Salicide Block
Drawn
Chrome
49
0.25
9Z
POLYFUSE
POLY FUSE Window
Drawn
Clear
220
0.25
75
Contact
Contact
Drawn
Clear
33
1
80
Metal1
Metal1
Drawn + Generated
Chrome
34
1
85
Via1
Via1
Drawn
Clear
35
1
88
Metal2
Metal2
Drawn + Generated
Chrome
36
1
91
Via2
Via2
Drawn
Clear
38
1
93
Metal3
Metal3
Drawn + Generated
Chrome
42
1
94
Via3
Via3
Drawn
Clear
40
1
96
Metal4
Metal4
Drawn + Generated
Chrome
46
1
92
FuseTop
FuseTop (MIM top)
Drawn
Chrome
75
0.5
97
Via4
Via4
Drawn
Clear
41
1
9E
Metal5
Metal5
Drawn + Generated
Chrome
81
1
9D
Via5
Via5
Drawn
Clear
82
1
98
MetalTop
TopMetal
Drawn + Generated
Chrome
53
0.5
95
Pad
Pad
Drawn + Generated
Clear
37
0
99
PIB
Bond opening and Passivation opening
Generated
Clear
50
0
9A
FuseWindow
Metal FuseWindow (Optional)
Drawn + Generated
Clear
96
0.5
Note
L67, L63, L9Z, L92 , L9A and L99 are optional layers.
PIB data polarity is chrome for mask used in FAB2. PIB data polarity is clear for mask used in FAB6.
L9A for FAB3E MCU OTP metal fuse process only.