![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..](https://image.slidesharecdn.com/f9831ba4-8c67-498c-81fb-d267ff801382-151024060449-lva1-app6891/85/Plating-Broken-Wafer-2-320.jpg)
Plating Broken Wafer
- 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..