Assembly Capabilities

Last Updated: August 14, 2019
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We are more than a prototype shop. MacroFab offers full turnkey services that take you from prototyping PCBs to drop shipping fully complete products to your customer’s door. Engineers can use our self-service platform to get quickly started with prototyping. When you are ready to scale your product, our project managers and network of partners are here to make it happen. Our team will help you scale through high volume production while our industry leading customer service team makes sure your experiance is as smooth as possible.

Assembly Location and Machines


Prototype services, high mix low volume runs, and first articles of products are built and assembled in-house at our facility in Houston, Texas, USA.

Our assembly line includes Mycronic MY200 and MY300 pick and place machines, Mycronic MY500 and MY700 paste jetters, Heller 9-zone reflow ovens, and RPS Rhythm Selective Solder machines. We also have process ovens for MSL requirements, automated wire cutting machines, and a wide array of hand-soldering/rework systems on our line.

High volume orders may be processed through our manufacturing partners running MacroFab processes and software. All manufacturing partners are certified and vetted by MacroFab.

More information about what kind of assembly classes we offer can be found on the Quick Turn, Prototype, or Production Class Service article.

MacroFab’s Standard Manufacturing Process


The typical assembly process for an order at MacroFab is the following.

  1. Order gets combined with similar orders; this spreads out the NRE charge for the run across all customers which significantly reduces the cost of prototypes
  2. MacroFab orders Parts and PCBs
  3. Once all the materials have arrived, paste gets applied to your panel with our MY500/MY700
  4. SMT Parts are placed on the PCB inside the MY200/MY300 Pick and Place
  5. Hand placement occurs if needed for SMT parts that are not machine placeable
  6. The panel then goes through the reflow oven
  7. Once the panel has cooled, the panel is then “de-panelized” into individual orders
  8. Through hole parts are installed and soldered, if needed
  9. If needed the PCBs are then washed
  10. Final QC and packaging

Component/Part Types


We support through hole, SMD, both leaded and leadless, BGA, LGA, PTH, hybrid, SoP, and daughter-board style components.  We do not currently support chip-on-board components. Inquire about support for stacked packages and flip-chip, which can be done on a case-by-case basis.

Mechanical Limits on Part Package Size for Assembly


The parts to be assembled onto a PCB must be equal to or larger then the following specifications.

TypeExamplesMinimal Size
Chip ComponentsResistors/Capacitors01005 10 mil x 05 mil (0.25mm x 0.0125mm)
Leaded PackagesSOIC/QFP/TSOP11.8 mil (0.3mm) Lead Pitch
Leadless PackagesQFN, TQFN11.8 mil (0.3mm) Lead Pitch
BGABGA/FBGA/LGA15.7 mil (0.4mm) Ball Pitch

For information about PCB manufacturing limits and Design Rule Checks (DRC) check out the knowledge base article PCB Specifications and DRC.

Double Sided Assembly


We support double-sided assembly at no extra charge.

IPC Quality Criteria for Assemblies


Unless otherwise requested, all assemblies are built to meet IPC-610-D Class 2 acceptance criteria.

ESD Safety


We follow all ESD safety procedures as documented in IPC-A-610. All of our work benches are grounded, and our floor is coated with a conductive sealant. Operators wear wrist straps at work stations, and heel straps for moving around the facility and moving product. All circuit boards are packaged in ESD bags prior to shipping.

RoHS/Lead-Free Solder Only


All assembly processes at MacroFab are designed to be RoHS compatible. We use SAC305 solder paste for surface mount components and SN100 solder for touch-up and through-hole soldering.

We are unable to use leaded, non-RoHS, or HMP solder in our processes.

No-Clean and Water-Soluble Flux


We currently use water-soluble fluxes and no-clean fluxes in our assemblies. All boards are water-washed during the assembly process, but small amounts of no-clean flux will remain after washing.

If you have a board component that is water-sensitive, please see the knowledge base article on The Parts Placement Screen about adding a note to the part for our Manufacturing Technicians.

Programming and Electrical Verification


All PCBs are 100% E-tested at the board house to ensure electrical verification. We can implement all customer established PCB assembly programming and testing procedures. All that’s required is a list of your needed equipment and documentation of your instructions. If you don’t yet have a procedure or need assistance in creating one, MacroFab can help put you in touch with the right resources through one of our many 3rd party vendor relationships. Let our sales team know of your specific requirements!

Conformal Coating


We can implement conformal coating on orders of any quantities. Our typical procedures involve masking and then coating the PCBs with a specified conformal coating. If you require conformal coating for your PCB assemblies, please contact our sales team to get a proper quote.

Certifications


Our growing network of partners have the following certifications:

  • ISO9001
  • AS9100
  • UL Registered
  • ISO13485
  • ISO/IATF 16949

Warranty and the MacroFab Manufacturing Guarantee


If your order has workmanship issues, we’ll do whatever it takes to get it right – for free. Our service team will provide transparent communication every at every step. As always, your information is 100% confidential and your intellectual property is secure. Our Manufacturing Services Agreement can be found here.

With MacroFab’s Manufacturing Guarantee we will make sure your order is correct, delivered promptly and on time, and with unrivaled manufacturing quality. Our network of global factories enable us to have competitive pricing at each stage of your products life cycle. These partners are held to the same strict quality standards that MacroFab is known for. With our transparent manufacturing model and suburb customer service you will always know what to expect.

More information about how start the RMA process can be found here Managing and Creating Returns.

Our goal is always to ensure that you have great, working products that exceed your specifications at a great price. We stand behind our work and will resolve any issues that arise. Please don’t hesitate to contact our support team if you run into any problems.