Why copper fill is used in PCB Design - Business Case Study

Scenario Mode

👤 Your Role: You are a PCB design analyst at an electronics manufacturing company.

📋 Request: Your manager wants a report explaining why copper fill is used in PCB designs and how it benefits the manufacturing and performance of the boards.

📊 Data: You have data from PCB design files showing layers with and without copper fill, thermal measurements, and manufacturing defect rates.

🎯 Deliverable: Create a clear report with visualizations showing the benefits of copper fill in PCBs, including thermal management and manufacturing quality improvements.

Sample Data

PCB_ID	Has_Copper_Fill	Thermal_Resistance (°C/W)	Defect_Rate (%)
PCB001	Yes	0.8	1.2
PCB002	No	1.5	3.5
PCB003	Yes	0.7	1.0
PCB004	No	1.6	4.0
PCB005	Yes	0.9	1.3
PCB006	No	1.4	3.8

1

Step 1: Organize the data by grouping PCBs into two categories: those with copper fill and those without.

Group data by 'Has_Copper_Fill' column.

Expected Result

Two groups: 'Yes' with 3 PCBs, 'No' with 3 PCBs.

2

Step 2: Calculate the average thermal resistance for each group.

Average Thermal_Resistance where Has_Copper_Fill = 'Yes' and where Has_Copper_Fill = 'No'.

Expected Result

Average thermal resistance with copper fill: 0.8 °C/W; without copper fill: 1.5 °C/W.

3

Step 3: Calculate the average defect rate for each group.

Average Defect_Rate where Has_Copper_Fill = 'Yes' and where Has_Copper_Fill = 'No'.

Expected Result

Average defect rate with copper fill: 1.17%; without copper fill: 3.77%.

4

Step 4: Create a bar chart comparing average thermal resistance for PCBs with and without copper fill.

X-axis: Has_Copper_Fill (Yes, No); Y-axis: Average Thermal Resistance.

Expected Result

Bar chart showing lower thermal resistance for PCBs with copper fill.

5

Step 5: Create a bar chart comparing average defect rates for PCBs with and without copper fill.

X-axis: Has_Copper_Fill (Yes, No); Y-axis: Average Defect Rate.

Expected Result

Bar chart showing lower defect rates for PCBs with copper fill.

6

Step 6: Summarize findings in a report explaining that copper fill improves thermal management and reduces manufacturing defects.

Write summary text based on calculated averages and charts.

Expected Result

Report stating copper fill lowers thermal resistance and defect rates, improving PCB performance and quality.

Final Result

Yes

↓

No

↓

Yes

↓

No

✓PCBs with copper fill have significantly lower thermal resistance (0.8 °C/W) compared to those without (1.5 °C/W).

✓Defect rates are much lower for PCBs with copper fill (1.17%) versus without (3.77%).

✓Copper fill helps spread heat efficiently and reduces manufacturing defects, enhancing PCB performance.

Bonus Challenge

Create a dashboard that dynamically filters PCBs by copper fill status and shows thermal resistance and defect rate trends over time.

Show Hint

Use slicers or filters for copper fill status and line charts for trends if you have date data.