Electronics 2

Question 1

What is the traditional PCB assembly method?

Answer 1

Through hole/Pin through hole?

Question 2

What are DIL ICs?

Answer 2

Dual In Line ICs. Use through hole technology. Pins are assembled linearly. More pins require greater chip size.

Question 3

What are SMT ICs?

Answer 3

Surface Mount Technology ICs. Solution to DIL. Pins are soldered to top of PCB instead of through hole. They can have a higher pin count, cheaper and smaller.

Question 4

What are area array packages?

Answer 4

Pins are on bottom of chip therefore less space taken up by pins. Solder connections cannot be inspected.

Question 5

What are passive components?

Answer 5

Resistors
Capacitors
Inductors

Question 6

What are active components?

Answer 6

Diodes
Transistors
ICs

Question 7

What are axial through hole components?

Answer 7

To wire connections on the same axis. Typically Rs and Ds and placed on a bandolier.

Question 8

What are radial through hole components?

Answer 8

Two or more parallel wires? Typically Cs and Ts. Harder to be detected by machines Usually taped with sprocket holes.

Question 9

What are local fiducials?

Answer 9

marks to identify where to place a component. Often used for vision systems to accurately identify placement position for fine pitch components