How to manufacture your PCB
From CunningWiki
Board Design Checklist
- Filenames example TurtleBoard v1.3.
- Turtle Board is the name
- 1 is a major revision
- 3 is a minor revision.
- Schematic Design Rule Check
- Stick with 0.1" grid
- Add two fiducials when applicable
- Large boards should have standoffs (4 min)
- PCB Design Rule Check
- Stick with the 0.05" grid, you may not violate this rule
- Make sure check for unrouted nets
- turn on only the unrouted layer
- Trace Widths
- 6 mil min
- 8 mil okay
- 10 mil preferred
- Trace Clearance
- 8 mil preferred
- Pour Clearance
- 12 mil preferred
- Vias
- 15 mil minimum
- 20 mil preferred
- Power/Ground net widths
- 12 mil - 100mA
- 16 mil - 500mA
- Generate a PDF of the schematic
- Generate Assembly drawings
- Add the border
- PCB DOCUMENTATION
- Make sure every board has the Logo or site URL
- Silkscreen appropriately
- Label LEDs and their purpose PWR, ON, etc
- Label Connectors; battery, audio, servo, etc
- Also label pins if applicable, example TXD, RXD, VCC, GND
- Label switches and their state, ON, Mode 1, Mode 2, etc
- The smallest text you can use is ??mil
- Stand Offs
- Drill: 0.12598425
- CunningTurtle.com
- LED Shift Register V1.0
- Size: 0.07
- Ratio: 8%
- Layer 21 tPlace
Manufacturing Checklist
- All PCBS must be black unless you have a good reason
- Load the seven files with Viewplot. Be sure to specify the drill file type as 2.4 leading.
- Top and bottom copper (.GTL, .GBL)
- Top and bottom solder mask (.GTS, .GBS)
- Top and bottom silkscreen (.GTO, .GBO)
- Drill file, 2.4 leading (.TXT)
- Be sure to specify the drill file type as 2.4 leading.
PCB Vendors
These are just some vendors we've had experience with. We listed their capabilities below
Advanced Circuits
Min. qty. 4, Get 1 EXTRA PCB FREE! White Legend (1 or 2 sides) Lead Time 5 Days 1 Part Number Per Order (extra $50 charge for multiple parts or step & repeat) 2-Layers, FR-4, 0.062", 1 oz. cu. plate Max. size 60 sq. inches Lead FREE Solder Finish No slots (or overlapping drill hits) Min. 0.006" line/space No Internal routing (cutouts) Min. 0.015" hole size No scoring, tab rout or drilled hole board separations All Holes Plated Routed to overall dimensions Gren LPI Mask Maximum 35 drilled holes Per Sq. Inch
Tech Circuits
http://www.techcircuits.com/prodserv.php
* Prototype, Low-to-Medium Production Volume
* Multilayer, Double-Sided and Single-Sided PCB
* Deliveries 1 Day to 4 Weeks
* Line Widths & Spacing to 0.003" (0.075 µm)
o UL Approved
* Low Loss/High Speed Laminates
o Rogers, Getek, Nelco
* Hybrid Multilayer Laminate Construction
* Impedance Control - Modeling & TDR Testing
* Micro Drilling to 0.006" (150µm) Diameter
* Laser Ablation 0.002" (50µm) to 0.006" (150µm)
* LPI Soldermask
o Via Plug & Solder Dams 0.002" (50µm)
* Alternate Finishes
o Electrolytic Au, Immersion Au, Silver, Tin; OSP, High-Temp OSP, HASL
* Edge Plating & Castillated Holes (Half Diameter PTH)
* All CAM Work Stations have Full Design Rule Checking Capability
o Frontline Genesis 2000 with ODB++ Compatibility
* Laser Photo Plotting
* Automated Optical Inspection (3)
* Net List Simultaneous Universal Electrical Test
o Flying Probe & Universal Grid
* Plating Thickness Inspection
o X-ray Fluorescent & Atomic Absorption Scope
* 24-Hour Data Transfer, FTP or E-mail
Gold Phoenix
Must buy Panel,
1-2 layer 155sqin ($110) 100sqin ($100) 5 day
2-4 layer 155sqin ($300) 100sqin ($280) 75sqin ($250) 6 day
* 2 or 4 layer boards - 0.062" FR4 material
* 2 Layer sizing:
o 7mil (~0.2 mm) spacing minimum
o 7mil (~0.2 mm) traces minimum
o 15mil (~0.5 mm) minimum drill size
* 4 Layer sizing:
o 7mil (~0.15 mm) spacing minimum
o 7mil (~0.15 mm) traces minimum
o 15mil (~0.33 mm) minimum drill size
o No blind/buried vias
* ???mil (~??.? mm) maximum drill size
* All drill hits are plated through
* Matte v-scored, Multipaneled
* Board is routed to the indicated border (+$20)
* Soldermask top side
* 1oz Copper
* No limit on the number of vias
* No limit on pads or components
* Multiple designs, multiple copies are allowed!
Batch PCB
Boards can be as small as 0.5" (~12.7 mm) square.
* 2 or 4 layer boards - 0.062" FR4 material
* 2 Layer sizing:
o 8mil (~0.2 mm) spacing minimum
o 8mil (~0.2 mm) traces minimum
o 20mil (~0.5 mm) minimum drill size
* 4 Layer sizing:
o 6mil (~0.15 mm) spacing minimum
o 6mil (~0.15 mm) traces minimum
o 13mil (~0.33 mm) minimum drill size
o No blind/buried vias
* 500mil (~12.7 mm) maximum drill size
* All drill hits are plated through
* No internal routes, no v-scoring, only drill files are sent to the fab house
* Board is routed to the indicated border (very clean edges, you can get creative with the shape as well!)
* Soldermask both sides
* 1oz Copper
* No limit on the number of vias
* No limit on pads or components
* Multiple designs, multiple copies are allowed!
* Any size up to 10x15", measured in inch increments (254mm x 381mm)
* Minimum billable size 1x1" (smaller boards are allowed but rounded up)
* Your design can be any size - 1 inch is the minimum
$10 setup fee (shown as a handling charge) - $2.50 per square inch for 2 layer designs, $8.00/sq. in. for 4 layer designs.
Turnkey PCB Vendors
http://www.eevblog.com/episodes/ (video) http://www.sbcinc.com/ http://www.sunstone.com/ http://www.screamingcircuits.com/ http://www.nexlogic.com/ https://www.twistedtraces.com/ http://www.cirexx.com/ http://www.pololu.com/ (stencils) http://www.aapcb.com/FAQ.aspx?Section=1 http://dangerousprototypes.com/2013/01/31/another-cheap-pcb-fab-house/
Seeed and Itead
