ELECTRONIC
MANUFACTURING
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CAPABILITIES

SMALL ENOUGH TO GET IT DONE FAST.
BIG ENOUGH TO GET IT DONE RIGHT.

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THRU-HOLE ASSEMBLY

IN-CIRCUIT / FUNCTIONAL TEST DEVELOPMENT

DESIGN REVIEW / RECOMMENDATIONS

CONFORMAL COATING

PROTO-TYPE ASSEMBLY

SURFACE MOUNT ASSEMBLY

PANEL AND CHASSIS ASSEMBLY

HIGH VOLTAGE BALL SOLDERING

DOCUMENT CONTROL

MATERIAL PROCUREMENT

DOCUMENTATION REQUIREMENTS

ELECTRONIC PCB DATA

  • Gerber Files - The electronic files that define the Printed Wiring Board. Includes all the data for the board house to build the PCB as well as the files we will use to have the Surface Mount Solder Paste stencil made from. We can also print out a copy of the board's silk screen that will show us component placement outlines and reference designator locations.
  • Surface Mount placement data in ASCII format. - This is the file we will use to generate placement programs from. It is a standard output on all CAD packages and is a list in text format that contains one line for each component, listing X and Y coordinates, Part Number, Reference Designator, and part rotation.

BILL OF MATERIALS

  • B.O.M. should be provided in EXCEL format and contain Customer Part number, Manufacturer and Manufacturers part number, Reference Designator, and a Manufacturer and Manufacturers part number for all acceptable substitute parts
  • The BOM data is imported into our ERP system and serves as our internal BOM as well as a template for our Manufacturing Engineering department to document our assembly procedure / shop router for your assembly.

EMS invests time and money into generating the internal documentation required to build your assemblies. Please respect our investment in your business and send us complete and up to date documentation. All documentation, including your Purchase Order should reference the revision level of the assemblies.

EMS quotations of pricing and lead-time are based on receiving this documentation in electronic format so it can be processed with as little manual intervention as possible to provide you with the lowest possible cost and quickest turnaround. Orders supplied without this data, complete and in electronic format, may generate additional processing costs and delay shipment.

CONSIGNED KIT / MATERIAL GUIDELINES

  1. Resistors, capacitors, and diodes should be supplied in continuous (not cut strips) tape and reel with a 6 inch leader (carrier and cover) to minimize set-up component loss. A manufacturing loss allowance of 5 pieces or 1% (whichever is greater) should be included.
  2. IC's should be provided in the original packaging. Continuous strips, Tubes, or matrix trays. Orientation of all components should be the same. Mixed polarity in tubes, strips, or trays, will cause the part to be placed incorrectly by automated equipment. A Manufacturing loss allowance of 3 pieces or 1% (whichever is greater) should be included.
  3. Matrix trays must be correctly sized to adequately protect surface mount IC leads from handling and shipment damage. The top of the "stack" also needs to be a correctly sized tray. Taping or rubber banding a piece of cardboard on top of IC's in a tray allows movement that WILL CAUSE DAMAGE.
  4. Moisture sensitive components should be shipped to EMS in their original sealed packaging. Such components received unsealed require an additional step - baking per manufacturers recommendations to remove moisture before soldering.
  5. Assure that all Parts are correctly labeled with your internal part number, and the corresponding manufacturer's part number on the BOM's.
  6. Itemized, accurate packing slips/pick lists must accompany all kits and parts shipped to EMS. This allows our receiving function to quickly and efficiently identify materials route to the jobs they are required for and AVOID DELAYS.
  7. EMS performs receiving inspection of all parts received on a sample basis for conformance to the BOM description and the Approved Vendor List derived from your BOM for each part.
  8. When multiple kits are issued that require sharing of components, we request that each kit be a complete kit (with sufficient overages supplied in multiple tubes, tapes and reels, and trays). This will facilitate building more than one assembly at the same time.
  9. Material shortages will cause your Company and EMS additional expense and delays. We need to count, report the shortage to you and wait for the components. You need to stop what you were doing (important, value added) and either find stock at your facility or order parts (trivial, non value added) from a vendor and then ship to us. We then need to receive the parts, inspect and route to the Job to continue. We both waste money, FedEx gets richer.
  10. EMS quoted lead times for consigned kits are calculated from the receipt of all parts. Please realize that if we start a week later than planned due to material shortages or documentation discrepancies that we will ship a week later.
  11. Part of EMS operating procedure, to ensure your satisfaction, is the use of a first article approval step for all new assemblies. This usually entails submitting a five piece acceptance lot for your evaluation prior to shipping production quantities. Surface mount components will be run on the entire lot to avoid an additional (costly) set-up.
  12. Materials for a first run should include all materials (including 2 PWBs) to build two additional assemblies in addition to the standard manufacturing loss allowance. These two boards will be built as "gold boards", one assembled through the surface mount process only and the other built to completion and maintained at EMS.

EMS quotations are based on receiving all consigned materials undamaged and in the packaging format described above to allow automated placement of surface mount and automated insertion of through hole parts.