68 The PCB Magazine • May 2015
ing by ink-jetting has become quite popular. Fig-
ure 3 shows the screen printing process while Fig-
ure 4 illustrates the simplicity of ink-jetting. PCB
references
1. Private communication, Robert Seyfert.
2. Printed Circuit Handbook, 6
th
Edition,
Clyde F. Coombs, Jr.
3. "Shadow" process by OMGI (formerly
Electrochemicals).
Karl Dietz is president of Karl
Dietz Consulting llC. He of-
fers consulting services and
tutorials in the field of circuit
board & substrate fabrication
technology. To view past col-
umns or to reach Dietz, click
here. Dietz may also be reached by phone at
(001) 919-870-6230.
karl's tEch talk
QUICK-TUrN CIrCUIT BOArD SHOPS continues
Figure 3: screen printing of legend ink. (source: Printar)
Figure 4: ink-jetting of legend ink. (source: Printar)
