Date post: | 22-Dec-2015 |
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S Pyatt
Cicorel optimised welding parameters
S Pyatt
30 degree loop parameters
S Pyatt
BJ820 bond chart for Cicorel board
S Pyatt
BJ820 bond chart for Loctite 3525 die to sub
Work in progress
S Pyatt
BJ820 bond chart for Loctite 3525 die to die
Work in progress
S Pyatt
BJ820 bond chart for Dymax 6 621 die to sub
S Pyatt
BJ820 bond chart for Dymax 6 621 die to die
S Pyatt
BJ820 bond chart for Dymax 3013 die to sub
S Pyatt
BJ820 bond chart for Dymax 3013 die to die
S Pyatt
BJ820 bond chart for Dymax 3013 die to sub
S Pyatt
BJ820 bond chart for TRA DUCT die to die
S Pyatt
BJ820 bond chart for TRA DUCT die to sub
Work in progress
S Pyatt
Pull test results Loctite 3525 die to die
Work in progress
S Pyatt
Pull test results Dymax 6 621 die to die
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 790
2
4
6
8
10
12
Pull test number
Gram
s
First heel break
Second heel break
First heel peel Second heel peel
05
1015202530354045
Freq
uenc
y
Average g: 9.470557Std Dev g: 0.440693
Fail type FrequencyFirst heel break 37
Second heel break 42First heel peel 0
Second heel peel 0
S Pyatt
Pull test results Dymax 3013 die to die
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 798
8.2
8.4
8.6
8.8
9
9.2
9.4
9.6
9.8
10
10.2
10.4
Pull test number
Gram
s
Average g: 9.310747Std Dev g: 0.481358
Fail type FrequencyFirst heel break 79
Second heel break 0First heel peel 0
Second heel peel 0First heel
breakSecond heel
breakFirst heel peel Second heel
peel
0102030405060708090
Freq
uenc
y
S Pyatt
Pull test results TRA DUCT die to die
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 820
2
4
6
8
10
12
Pull test number
Gram
s
First heel break
Second heel break
First heel peel Second heel peel
0102030405060708090
Freq
uenc
y
Average g: 8.99628Std Dev g: 0.488235
Fail type FrequencyFirst heel break 82
Second heel break 0First heel peel 0
Second heel peel 0
S Pyatt
Pull test results Loctite 3525 die to substrate
Work in progress
S Pyatt
Pull test results Dymax 6 621 die to substrate
1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435363738394041424344454647484950510
2
4
6
8
10
12
14
16
Pull test number
Gram
s
First heel break
Second heel break
First heel peel Second heel peel
0
5
10
15
20
25
30
Freq
uenc
y
Average g: 10.88151Std Dev g: 1.444102
Fail type FrequencyFirst heel break 14
Second heel break 13First heel peel 0
Second heel peel 24
S Pyatt
Pull test results Dymax 3013 die to substrate
1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435363738394041424344454647484950510
2
4
6
8
10
12
14
16
Pull test number
Gram
s
First heel break
Second heel break
First heel peel Second heel peel
0
5
10
15
20
25
30
Freq
uenc
y
Average g: 10.6189Std Dev g: 1.301571
Fail type FrequencyFirst heel break 18
Second heel break 6First heel peel 0
Second heel peel 27
S Pyatt
Pull test results TRA DUCT die to substrate
Work in progress
S Pyatt
Why is there are difference? Pull angles!
S Pyatt
Maths goes h
ere
S Pyatt
The peels are actually vertical tears
Completed weld marks
S Pyatt
Meanwhile on the dies
No peels. All heel breaks.
S Pyatt
Conclusions
• All three UV glues are suitable for wire bonding on the Hesse BJ820.
• Pull testing for die to die wires gives the correct results.
• Pull testing for die to substrate wires gives false results due to incorrect pull angles. The process is not suitable for production work.