Printed Circuit Boards: Design, Fabrication, and Assembly
McGraw Hill Professional, 2005 M09 7 - 704 pages
The printed circuit is the basic building block of the electronics hardware industry. This is a comprehensive single volume self-teaching guide to the art of printed circuit board design and fabrication -- covering the complete cycle of PCB creation, design, layout, fabrication, assembly, and testing.
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a Ammonium chloride 100 to 110 g/l a pH 7.8 to 8.2 a Temperature 45 to 55 °C a
Specific gravity 1.2 at 20 °C a Copper content 150 to 160 g/l Process Control and
Regeneration Etching solutions are operated between 50-55 °C and are well ...
9.4.2 Bubble Etching a To ensure fresh etchant contact at the surface and to rinse
away dissolved metal; and a To enhance the oxidation power and to regenerate
the etchant. Figure 9.5 shows the schematic arrangement of the bubble etching ...
In PCB etching on an industrial scale, the following are the various desirable
features which, in practice, can only be partially fulfilled: a High etching speed; a
High copper dissolving capacity; a No attack on the resists used; a Constant
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1 Basics of Printed Circuit Boards
2 Electronic Components
3 Layout Planning and Design
15 other sections not shown