Better Boards, Inc. Initial Handoff

Home Products Circuit and System Design PCB Design Services BBI Library Price Quote CAD Shots #1 CAD Shots #2 CAD Shots #3 Initial Handoff Customers Contact Us		When we begin your project, there will be many questions we'll have to ensure you get the best product in the most timely manor. The more information that is handed off up front, the fewer questions and delays there will be later on.  The following list might also spark some internal questions that you haven't considered yet.  Let's get started. For Simple Boards - Most of the things listed below will not apply, but it might be a good idea to read through the list anyway. General Information: Project Name: Board Name: PWB Number / Fab Drawing Number (if different) PCB Assembly Number / Assembly Drawing Number (if different) Schematic Drawing Number Bill of Materials (BOM) Number Assembly Panel Number / Panel Drawing Number (if different) Mechanical Board Dimensions and Thickness (include tolerances) Mounting and Tooling holes: locations and sizes (include tolerances) Locations of critical components Connectors LED's Switches Tall components Heatsinks Others ... Max Component Heights Top Side Bottom Side Keepouts Components Copper Traces / Etch Vias Component height restriction Components requiring special clearances For Heatsinks For Sockets: programming , emulator,  etc... For SIMM or DIMM modules For large mating connectors Electrical Expected number of layers Stackup: Is there an existing one? Do you need us to generate one? Copper weights per layer Board Technology Thru Hole SMT Blind / Buried Via technology? HDI or Sequential Lamination? Please list any Noisy or sensitive nets or buses List any components that will not be on production boards Test / Debug Headers Sockets Others .... Do you desire the outer layers to be flooded with copper for shielding? Grounding schem Signal ground Earth ground Safety Ground Analog and Digital ground Do the mounting holes need to be tied to ground? If so, which one? High Speed Requirements Single ended impedance requirement Diff pair impedance Special dielectrics Burried Capacitance Clock Speeds Special Rules Delay Matched Delay Relative Propagation Delay Max Via Count Max Stub Lengths Xnets and Topologies Ground Stitching at board edge Crosstalk limits or concerns Are there buses or nets that must or can't reference a particular voltage? Hand Routing critical nets or net priorities Thermal Specify Air flow direction Copper Areas for thermal dissipation Heatsink requirements List of the hot parts so we won't place them downstream Power and Planes Input Voltage.  Is it high voltage? Do you have a preferrence on what supply voltage goes on what layer? For Split planes, do you have an idea of what voltages to combine on a layer? Are there any high current nets? How many Amps? List any special Creepage & Clearances Panel Layout Panel Tooling Holes: size and locations Panel Fiducials: size and locations Depanalization schem V-Score with pizza cutter breakaway tabs, mouse bites, dog bones Manufacturing and Assembly List any Special Silkscreen Logos Assembly number and Box for dash numbers Serial Number Outline LED Labels Voltage labels HIGH VOLTAGE or WARNING labels Switch, Reset, Dipswitch, Jumpers, Programing, etc.. Wave solder Direction if bottom side parts will be waved Will a Selective Solder Pallet be used Notes Special Fab notes Special Assembly notes Special Details on Assembly Drawing A list of all names and positions to be on the drawings. Here are some options: Electrical Engineer Mechanical Engineer Compliance / Safety Manufacturing Engineer Project Engineer Power Engineer CAD Engineer - That's us :-) Surface Finish HASL Silver Gold White Tin Other ... Special Soldermask or Silkscreen colors (default is green mask and white ink) Test Strategy Do you need test points for ICT Fixture (bed of nails)? Do you need testpoints for flying probe? Do you require 100% TP coverage? Is JTAG and Boundary Scan in the test plan? Are there nets that will not require test access? Files we will need Netlist Datasheets for anything that is not standard (0603, so-8, etc..) Mechanical drawings Schematic in .pdf format (notes or instructions can be on the schematic) A block diagram showing basic functionality, data flow, and clock trees can be helpful