This document discusses two projects: 1. Reducing the broken panel rate during the electroplating process by adjusting the width of the masking tape and rotating panels from the outer area to the center during rework to avoid broken panels. 2. Developing an internal nickel plating solution to reduce costs by designing an experiment that tests different concentrations of nickel chloride, nickel sulfamate, and boric acid and calculates the nickel concentration in the solution. The internal chemicals test reduced costs by 99.39% compared to sending chemicals to Murata Japan.

1. Project of Broken Panels: Reduce panel broken rate at Electroplating process
Alignment straight to the panels by adjusting
the width of masking jig bonding tape.
During re-work of masking tape bonding, rotate the panel
from outer area to centre for remove the bonding tape .
Problem statement:
The shifted of masking tape from panel results to rework and reworking will cause panel broken problem.
Method 1: Fine tune the bonding jig width to avoid
masking tape shifted, avoid re-work frequency.
Method 2: Re-work by rotate from outer area to centre.
Apply even stress to the panel to avoid broken
3.97% 4.11% 3.82% 3.92%
1.11% 0.70% 0.54% 0.55%
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
3.50%
4.00%
4.50%
5.00%
Wk 22 Wk 23 Wk 24 Wk 25 Wk 26 Wk 27 Wk 28 Wk 29
Before After
D
e
f
e
c
t
i
v
e
R
a
t
e
(
%
)
Time
Electroplating process Defective Rate Monitoring Chart
Others
Foreign
Material
Color
Change
Broken
wafer
2.98%
0.80%
0.94%
0.31%
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
3.50%
4.00%
4.50%
Wk 25 Wk 26
After
Contribution of method to Broken Defective Rate (%)
Re-work method Fine tune Jig
Before

2. Project of Cost Reduction: Develop a internal Nickel plating solution to cost reduction
Design Of Experiment:
Factor: 3
Level: 2
Replication: 2
By follow the formula to calculate NPA:
Concentration of Nickel solution] (g / ℓ) = [Nickel chloride + Nickel Sulfurmate ] (m ℓ × [0.5N-sodium
hydroxide * activity] × 25.6 * Boric acid
No. Random No. Nickel Chloride (ml) Nickel Sulfurmate (ml) Boric acid (g) Nickel Sol(g/L)
1 15 1.0 1.0 1.0 24.5
2 2 1.5 1.0 1.0 80.9
3 9 1.0 1.5 1.0 30.3
4 6 1.0 1.0 1.5 22.0
5 3 1.5 1.5 1.0 100.2
6 7 1.5 1.0 1.5 75.3
7 11 1.0 1.5 1.5 73.0
8 14 1.5 1.5 1.5 64.0
9 10 1.0 1.0 1.0 26.0
10 1 1.5 1.0 1.0 82.0
11 5 1.0 1.5 1.0 32.0
12 8 1.0 1.0 1.5 28.0
13 12 1.5 1.5 1.0 95.3
14 16 1.5 1.0 1.5 69.4
15 13 1.0 1.5 1.5 62.0
16 4 1.5 1.5 1.5 82.7
Cost of sending chemicals to Murata Japan: SGD 6000/month
Cost of internal chemicals test: SGD36.8/month
Cost Reduction: 99.39% reduction
By develop the test we can save > SGD 5000 per month. Target successfully achieved..