PCB Technology & Digital Applications 4 — Questions and Answers
Question 1: What PCB design technology allows components to be embedded inside the PCB substrate rather than mounted on the surface?
- Embedded component technology (Correct answer)
- Ball Grid Array (BGA)
- Through-hole technology
- Pin-in-paste technology
Correct answer: Embedded component technology
Embedded component technology places passive or active components within the PCB core layers to save surface area and shorten interconnects.
Question 2: Which digital tool is used to verify that a PCB layout matches the original schematic by comparing netlists?
- Layout vs. Schematic (LVS) checker (Correct answer)
- DRC tool
- Gerber viewer
- SPICE simulator
Correct answer: Layout vs. Schematic (LVS) checker
LVS compares the extracted layout netlist against the schematic netlist to ensure every connection is correctly implemented.
Question 3: In high-speed PCB design, which software analysis technique identifies traces that may act as unintended antennas and radiate EMI?
- Electromagnetic simulation (EM simulation) (Correct answer)
- Thermal mapping
- Signal integrity eye diagram analysis
- Static timing analysis
Correct answer: Electromagnetic simulation (EM simulation)
EM simulation tools model the board's electromagnetic fields to predict radiation hotspots and coupling paths.
Question 4: What is the primary advantage of using a PCB design tool with real-time DRC enabled during routing?
- Violations are flagged instantly so the designer can correct them without running a separate check afterward (Correct answer)
- It speeds up Gerber file generation
- It automatically fixes all spacing violations
- It eliminates the need for a schematic
Correct answer: Violations are flagged instantly so the designer can correct them without running a separate check afterward
Real-time DRC catches errors such as clearance violations immediately, reducing rework at the end of the design cycle.
Question 5: Which modern PCB EDA platform is known for being cloud-based and allows multiple designers to collaborate on the same board in real time?
- Altium 365 (Correct answer)
- Cadence OrCAD
- Mentor PADS
- Zuken CR-8000
Correct answer: Altium 365
Altium 365 is a cloud platform that enables version control, design sharing, and simultaneous multi-user collaboration on PCB projects.
Question 6: What does 'length matching' in a PCB EDA tool accomplish for differential pairs or parallel buses?
- It ensures all traces in a group reach the same physical length so signals arrive simultaneously (Correct answer)
- It matches component lengths for pick-and-place machines
- It adjusts trace widths to equalize resistance
- It synchronizes layer stackup thicknesses
Correct answer: It ensures all traces in a group reach the same physical length so signals arrive simultaneously
Length matching adds serpentine meanders to shorter traces so all signals in a bus travel equal distances and arrive at the same time.
Question 7: In PCB layout software, what is the purpose of a 'courtyard' layer for a component footprint?
- It defines the keep-out boundary around the component to prevent placement of other components too close (Correct answer)
- It specifies the solder paste aperture for stencil printing
- It marks the component for 3D rendering only
- It defines the copper pad dimensions
Correct answer: It defines the keep-out boundary around the component to prevent placement of other components too close
The courtyard layer provides a clearance zone around the component body so DRC can detect placement conflicts between adjacent parts.
PCB Technology & Digital Applications 4
What PCB design technology allows components to be embedded inside the PCB substrate rather than mounted on the surface?