What are the details of your FR4 material?
- High Glass Transition Temperature (Tg) (150Tg or 170Tg)
- High Decomposition Temperature (Td) (> 325º C)
- Low Coefficient of Thermal Expansion (CTE) ((3.0%-3.8%)
- Dielectric Constant (@1 GHz): 4.25-4.55
- Dissipation Factor (@ 1 GHz): 0.016
- UL rated (94V-0, CTI = 4)
- Compatible with standard and lead-free assembly.
- Operating temperature is 125 degrees C.
While the laminate has a UL flammability rating UL rated (94V-0, CTI = 4), we do not stamp a UL rating on the boards. As a result, the boards that we manufacture are not UL rated.
Do you offer PCB Assembly?
Can I share my custom components with others?
How Do I use Stencils
|1. Example of the prototype stencil as you will receive it.|
|2. Place the large L-shaped board fixture on a flat surface and tape it down to prevent movement.|
|3. Place the PCB into the L-shaped fixture.|
|4. Place the small L-shaped board fixture in the opposite corner and tape down to prevent movement.|
|5. Align the stencil over the SMT pads and tape the flat edge to the L-shaped bracket.|
|6. Apply a bead of solder paste along one edge of the prototype stencil.|
|7. Using squeegee, make a single pass over the apertures to deposit paste.|
|8. Remove board from fixture.|
|9. Using the vacuum pick & place tool, place components in the paste.|
|10. Place temperature marker on the board. Using preferred method, (toaster oven, hot plate, heat gun, etc.) heat board to the paste manufactures recommendations for re-flow solder. The temp marker will indicate temperature by changing color.|
How do I add my employees to my Business Membership?
Once you have purchased your business membership, as the subscription manager you can request to have employees added your account.
- The employee to be added will need to create an account on ExpressPCB.com
- Subscription manager can request to add employees from the My Account page.
- Click on My Subscription tab
- Fill out form to request adding employee to the account.
- Include Subscription Number, Name and Email Address of the employee to add.
- Once the addition is confirmed by ExpressPCB Support, the employee with the linked account will have all of the benefits of the Business Membership.
PCB MFG Aids
Stevens Products Inc.provides edge protectors, Gold Finger Gloves, PCB Stiffeners, PCB Carriers, etc. Check out their products!
Submitted by our cool customer: Peter Capobianco “…audiophile and tube hi-fi DIYer extraordinaire…”
PCB Via Calculator
The Tektronix TDS-1000 is a great low-cost digital storage oscilloscope for the microprocessor developer. We have the old model TDS-220 and love it. The ability that storage scopes have to capture and display a single event make them extremely handy for micro controller development. This model’s very compact size also makes it great in the field. We do however consider that an analog scope may still be a better choice for doing sensitive analog work. These scopes are somewhat noisy at low voltages.
When laying out PC boards, it is very useful to measure small distances accurately. Selecting hole sizes for components requires measuring pin diameters in thousandths of inches. When placing pads for components or connectors with unusual lead spacing, it is necessary to carefully measure the pin layout. We have always been happy with Mitutoyo calipers for this job. We use both their dial and digital display models. A good selection of Mitutoyo calipers are available at McMaster-Carr. For the casual user, a no-name brand dial caliper is likely to be fine and cost under $50.
Digi-Key is a great resource for electronics components, such as semiconductors, resistors, capacitors, and connectors. They have a large inventory and ship very quickly. Their catalog often shows physical dimensions of parts, which is a big help when laying out PC boards. Many parts found in the ExpressPCB component library include Digi-Key part numbers. products!
Mouser Electronics is very useful source for electronic components, particularly when prototyping. Their website and online catalog is an important source of technical information such as component data sheets.
Pic-Servo Motion Control
We find that motion control projects are made easy using the PIC-SERVO. The PIC-SERVO is available either in a two chip set, or as a single board controller that includes the motor amplifier. It has a serial interface so it is easy to connect with a computer. The PIC-SERVO is probably the fastest and least expensive way to get a DC servo motor up and running. They also offer a stepper motor controller.
If you are considering patenting a new invention or product, a great place to start your research is GetThePatent.com. They offer a fast online tool for patent searches. Their database not only includes US patents, but also the patents registered in most European countries and Japan.
Envision Plastics and Design offers an interesting enclosure solution for products to be manufactured in quantities from 50, up to a few thousand. Their plastic enclosures have a “consumer product” feel, but do not require expensive tooling or setup costs. This makes them a practical solution for small production runs.
Alta Via Technologies
Alta Via Technologies is a high-end PCB design service. They specialize in laying out complex circuit boards for commercial, military, and medical applications. They offer significant expertise when working with PCB design issues such as high speed circuits (10Ghz +), high density SMT packages, and controlled differential impedance.
McMaster-Carr Supply Company is a good source for mechanical parts. They have a complete selection of screws, nuts, washers and other fasteners. McMaster’s offers raw materials such as aluminum and plastics. They are also a good source for tools and machine shop supplies. They almost always have what you need in stock and ship very quickly.
Online Metals is a very convenient source for purchasing small amounts of machinable metals and plastic. They have a good selection of aluminum in both sheet and plate, as-well-as delrin, nylon and acrylic. They will also cut to size.
AppCAD is a free RF design tool for Windows that can be downloaded at no cost from HP / Agilent. It is useful to help with the calculations for many RF, microwave, and wireless applications. PC board designers of RF circuitry will find the transmission line calculator handy. It also includes many computerized application notes relating to RF topics.
Can I order Production Service with no soldermask?
To ensure no soldermask on the top or bottom layer, use the
rectangle tool to mask out the soldermask for the entire board on both
the top and bottom soldermask layers.
Go to View Options
Select “View Top Soldermask Layer”:
Use the rectangle to cover the entire board.
Do the same for bottom solder mask layer.
How do I reorder my ExpressPCB design?
If you would like to reorder boards, the procedure
is the same as when they were ordered the first time. All orders must
be placed using the ExpressPCB program. Be sure to have the .PCB file
loaded that you would like to order.
Will you quote my Gerber files or files from other design tools?
Unfortunately our manufacturing service is only available to orders from our ExpressPCB design software.
For manufacturing orders from Gerber files we recommend you try EasyPCBUSA.com,
they utilize the same PCB manufacturer as we do, so we can vouch for
the quality and on time delivery, it will be second to none. The
online quote form is very easy to use. They can be reached at Support@EasyPCBUSA.com if you have questions.
We have partnered with Sunstone Circuits to provide quality PCBs
made in the USA for 20 years. They accept native files from several
different PCB Design applications as well as Gerber files, and can
provide a more expansive array of manufacturing options. You can visit
them at //www.sunstone.com or contact them at firstname.lastname@example.org.
Can I have my ExpressPCB design converted to Gerber files?
You can now request gerber files right from our
software when ordering your PCBs! There is no longer any additional fee
to request gerber files with your order. We do not currently offer
gerber files without an order for PCB manufacturing.
We will then email the gerber files back to you as an attachment with your tracking number when your boards are shipping.
You will receive these files:
+ Top silkscreen layer
+ Top solder paste layer
+ Top soldermask layer
+ Top copper layer
+ Bottom copper layer
+ Bottom solder paste layer
+ Bottom soldermask layer
+ Drill file
+ 4 layer designs also include the 2 inner layers
+ Pick and Place Files
Will you design my circuit board for me?
We do not provide design services for creating circuit boards.