MEC 431 Lecture Notes - Lecture 32: John Wiley & Sons, Drill, Photolithography

• School: Ryerson University
• Department: Mechanical Engineering
• Course: MEC 431
• Professor: N/ A

Document Summary

Features of a double-sided pcb: section of a double sided pcb, showing various features accomplished during fabrication: tracks and lands, and copper plated insertion and via holes. Subtractive circuitization method: (cid:523)(cid:883)(cid:524) apply resist to areas not to be etched, using photolithography to expose the areas that are to be etched, (2) etch, and (3) strip resist. Pcb as mechanical components (e. g. , fasteners, heat sinks) mounted on a: electronic components (cid:523)e. g. , )c packages, resistors, capacitors(cid:524) as well, level two in electronics packaging, pcb assembly is based on either, some pcb assemblies include both types. 2012 john wiley & sons, inc. m p groover, fundamentals of modern: through hole(a. k. a. pin in hole)technology, surfacemounttechnology(smt) Component placement in smt sufficiently until soldering provides a permanent mechanical and: challenge is to correctly position component on pcb and affix it, two placement and soldering methods (cid:883). Solderpasteandreflowsoldering electrical connection: adhesivebondingandwavesoldering, certain types of smt components are more suited to one method or the other.