Through-hole technology
Through-hole technology is a way to mount electronic components to printed circuit boards (PCB).
It involves the use of leads on the components that are inserted into holes drilled in the PCBs and soldered to pads on the opposite side either by manual assembly (handiwork) or by the use of automated insertion mount machines.[1][2]
Many parts made for through hole mounting are larger than those for surface-mount technology.
Through-hole Technology Media
Through-hole (leaded) resistors
Through-hole devices mounted on the circuit board of a mid-1980s home computer. Axial-lead devices are at upper left, while blue radial-lead capacitors are at upper right
Axial- (top) and radial- (bottom) leaded electrolytic capacitors
Components like integrated circuits can have upwards of dozens of leads, or pins
A box of drill bits used for making holes in printed circuit boards. While tungsten-carbide bits are very hard, they eventually wear out or break. Making holes is a considerable part of the cost of a through-hole printed circuit board.
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References
- ↑ Electronic Packaging:Solder Mounting Technlogies in K.H. Buschow et al (ed), Encyclopedia of Materials:Science and Technology, Elsevier, 2001 ISBN 0-08-043152-6, pages 2708-2709
- ↑ Horowitz, Paul; Hill, Winfield (1989). The art of electronics (2nd ed.). Cambridge [u.a.]: Cambridge Univ. Press. ISBN 978-0-52137-095-0.
