Surface-mount devices (SMD) enabled the manufacture of smaller, denser electronic assemblies compared to traditional through-hole components. Assess this statement.

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Modern electronics leverage SMD to achieve high component density, reduced parasitics, and automated high-speed placement. This shift is fundamental to smartphones, wearables, and compact industrial electronics.


Given Data / Assumptions:

  • SMD parts mount directly to PCB pads without drilled leads.
  • Pick-and-place automation supports smaller footprints and tighter spacing.
  • Electrical performance benefits include lower lead inductance and shorter interconnects.


Concept / Approach:
By removing the necessity for through-holes and long leads, SMD allows both sides of the PCB to be densely populated. Package families (0402, 0603 passives; SO/TSSOP/QFN/DFN ICs) are designed specifically for density, enabling miniaturization and higher functional integration.


Step-by-Step Solution:

Compare through-hole lead spacing to SMD pad pitch.Note reduced component volume and pad-to-pad spacing with SMD.Recognize assembly automation improvements and panel utilization gains.Conclude SMD directly supports smaller, denser assemblies.


Verification / Alternative check:
Industry design rules and assembly house capabilities explicitly target fine-pitch SMT; historical trends show continuous footprint shrinkage with SMD adoption.


Why Other Options Are Wrong:

  • Incorrect: Conflicts with well-established manufacturing practice.
  • Ambiguous / Cannot be determined: The statement is broadly and demonstrably true.


Common Pitfalls:
Assuming all SMD is inherently better; thermal dissipation and rework can be more challenging, but density gains remain undeniable.


Final Answer:
Correct

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion