Why routing connects the circuit physically in PCB Design - Business Case Study

Scenario Mode

👤 Your Role: You are a PCB design analyst working with the engineering team.

📋 Request: Your manager wants a clear report explaining why routing physically connects circuits on a PCB and how this impacts the overall design and functionality.

📊 Data: You have data on PCB components, their connections, and routing paths including length and layer information.

🎯 Deliverable: Create a simple dashboard that shows the physical connections between components, explains the importance of routing, and highlights how routing affects signal flow and circuit performance.

Sample Data

Component	Pin	Connected To	Routing Length (mm)	Layer
U1	Pin1	R1 Pin1	15	Top
R1	Pin2	C1 Pin1	10	Top
C1	Pin2	U2 Pin3	20	Bottom
U2	Pin4	GND	5	Bottom
U1	Pin2	VCC	8	Top
R2	Pin1	U2 Pin1	12	Top
R2	Pin2	GND	7	Bottom
C2	Pin1	U1 Pin3	9	Top
C2	Pin2	GND	6	Bottom

1

Step 1: Create a table showing each component pin and its physical connection to another component pin including routing length and layer.

Use the sample data as is to list connections with columns: Component, Pin, Connected To, Routing Length (mm), Layer.

Expected Result

A clear table listing all physical connections and routing details.

2

Step 2: Calculate total routing length per component to understand physical wiring complexity.

Sum Routing Length (mm) grouped by Component.

Expected Result

U1: 23 mm, R1: 10 mm, C1: 20 mm, U2: 5 mm, R2: 19 mm, C2: 15 mm

3

Step 3: Create a simple network diagram visualization showing components as nodes and routing connections as edges labeled with length and layer.

Use a BI tool's network or relationship chart with nodes=Components and edges=Connections with labels showing Routing Length and Layer.

Expected Result

A visual map showing how components are physically connected on the PCB.

4

Step 4: Add a text box explaining why routing physically connects circuits: to enable electrical signals to flow between components, ensuring the circuit functions as designed.

Text: 'Routing creates physical copper paths on PCB layers connecting component pins. These paths allow electrical signals to travel, making the circuit operational.'

Expected Result

Clear explanation visible on the dashboard.

5

Step 5: Highlight how routing length and layer affect signal quality and design complexity.

Text: 'Longer routing paths can cause signal delay and interference. Using multiple layers helps optimize routing and reduce noise.'

Expected Result

Insightful note on routing impact included in the report.

Final Result

PCB Routing Connections Dashboard

Components and Connections:
U1 --15mm(Top)--> R1 --10mm(Top)--> C1 --20mm(Bottom)--> U2 --5mm(Bottom)--> GND
U1 --8mm(Top)--> VCC
R2 --12mm(Top)--> U2 --7mm(Bottom)--> GND
C2 --9mm(Top)--> U1 --6mm(Bottom)--> GND

[Network Diagram Visual]

Key Notes:
- Routing physically connects components to allow signal flow.
- Routing length affects signal timing and quality.
- Multiple layers optimize routing and reduce interference.

✓Routing physically connects component pins with copper paths on PCB layers.

✓Total routing length varies per component, affecting design complexity.

✓Longer routes can cause signal delay and noise.

✓Using multiple layers helps manage routing efficiently.

✓Physical routing is essential for circuit functionality.

Bonus Challenge

Create a measure to calculate average routing length per connection and identify the longest single routing path.

Show Hint

Use average and max aggregation functions on the Routing Length column grouped by connections.