PCB (Printed Circuit Board) fabrication dead bug circuits etching set-up, feature size, batch lithography, transfer, print ferric/cupric chloride, ammonium/sodium persulfate citric acid, peroxide SDS water consumption waste machining finish machines tools 0.010 1/64 1/32 V-bits tapered bits fixturing underlay zeroing mounting lowering probing set-screws, collets lifetime deburring cleaning climb vs conventional nesting registration vinyl cutter flex connections encapsulation milling laser cutter engraver combined LIG printing conducting inks plating sewing PCB materials rigid FR4 (epoxy glass) FR1 (phenolic paper) garolite flex Kapton, Pyralux #1 epoxy film, #1126 copper tape high-frequency teflon glass copper 0.5 oz: 17.5 um 1.0 oz: 35 um 2.0 oz: 70 um board houses JLCPCB, PCBWay, OSH Park, Aisler, PCB, kit, BOM design rules width/spacing (15, 5 mils) layers 1, 1.5, 2, 2+, 4, N mechanical, drill, solder mask, silk screen vias wires, rivets, plated, blind, buried components through-hole surface-mount chip-scale breadboards assembly solder iron station fume extractor burns ROHS types lead-free wire paste SDS leaded wire paste SDS low-temp wire paste eutectic tinning wetting manual, drag, wave cold solder joints, solder bridges, checking joints flux core, paste, pen reflow FR1 vs FR4 hot air wire, paste hot plate, convection oven, IR stencil magnifying stuffing component orientation tacking down parts bottom to top, inside to outside breakout headers fumes washing desoldering braid tweezers vacuum hot air gravity cutting traces, adding jumpers placement pick-and-place encapsulation CAM formats Gerber/RS-274X png resolution FlatCAM pcb2gcode gerber2img gerber2png wiki mods tool changer video trace width traces traces+exterior interior 1/64" 0.010" V-bit fiber laser galvo laser pad, trace size debugging inspect, reflow solder joints check component orientation, values verify data sheets confirm connector orientation measure supply voltages probe I/O signals assignment assignment assignment group assignment: - characterize the design rules for your in-house PCB production process - submit a PCB design to a board house individual assignment: - make and test a microcontroller development board that you designed - extra credit: make it with another process
