IPC-4556 印制板化学镍钯浸金（ENEPIG）规范ENG.pdf - 第29页
Figure A3-3 Electroless Palladium Thickness Readings in Microinches for the Sixteen T est Pads Where C Is the Reference XRF 9 8 7 6 5 4 3 2 1 abc def gh test unit ijk lm n microinches Pd Means and Standard Deviations Lev…
Figure A3-2 Immersion Gold Thickness Readings in Microinches for the Sixteen Test Pads Where C Is the Reference XRF
2
1
0
abcdef gh
test unit
ijklmn
microinches Au
Means and Standard Deviations
Level Number Mean Std Dev Std Err Mean
a 16 0.82562 0.068796 0.01720
b 16 0.85000 0.136626 0.03416
c 16 0.72188 0.071575 0.01789
d 16 0.82188 0.077908 0.01948
e 16 1.63750 0.114746 0.02869
f 16 1.04438 0.129819 0.03245
g 16 0.18038 0.079997 0.02000
h 16 0.82900 0.094297 0.02357
i 16 0.83875 0.086783 0.02170
j 16 0.46513 0.124357 0.03109
k 16 0.58631 0.106453 0.02661
l 16 0.87500 0.134164 0.03354
m 16 0.72500 0.100000 0.02500
n 16 0.96350 0.221891 0.05547
IPC-4556 January 2013
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Figure A3-3 Electroless Palladium Thickness Readings in Microinches for the Sixteen Test Pads Where C Is the Reference
XRF
9
8
7
6
5
4
3
2
1
abcdef gh
test unit
ijklmn
microinches Pd
Means and Standard Deviations
Level Number Mean Std Dev Std Err Mean
a 16 2.72938 0.19526 0.04881
b 16 4.05625 0.26069 0.06517
c 16 3.20437 0.07192 0.01798
d 16 3.17687 0.08957 0.02239
e 16 2.65625 0.16721 0.04180
f 16 2.85875 0.15077 0.03769
g 16 1.50188 0.15715 0.03929
h 16 3.43562 0.31985 0.07996
i 16 3.50937 0.20959 0.05240
j 16 2.79438 0.60361 0.15090
k 16 2.48875 0.48485 0.12121
l 16 3.42500 0.20817 0.05204
m 16 3.60000 0.16733 0.04183
n 16 6.59625 1.24604 0.31151
January 2013 IPC-4556
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年率
单
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230
220
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200
190
170
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Figure A3-4 Electroless Nickel Thickness Readings in Microinches for the Sixteen Test Pads Where C Is the Reference XRF
150
microinches Ni
abcdef gh
test unit
ijklmn
Means and Standard Deviations
Level Number Mean Std Dev Std Err Mean
a 16 167.777 2.71270 0.6782
b 16 162.850 2.70604 0.6765
c 16 210.259 3.19157 0.7979
d 16 183.289 1.91206 0.4780
e 16 201.806 3.30343 0.8259
f 16 195.055 5.64116 1.4103
g 16 195.575 1.84914 0.4623
h 16 207.644 2.34321 0.5858
i 16 207.906 2.16193 0.5405
j 16 188.837 4.13874 1.0347
k 16 190.637 3.09901 0.7748
l 16 159.694 3.62721 0.9068
m 16 156.775 2.75064 0.6877
n 16 234.000 6.01565 1.5039
IPC-4556 January 2013
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