Avoiding Delays

Our PCBExpress Quickturn service offers customers the most affordable prototyping solution, due to the limited review program we have in place. Of course, to make the most of this capability, customers need to avoid the common pitfalls that cause project delays. The most common issues that lead to delays are:

1. Layers not mapped correctly, clearly, or used “Not Sure”
   Not all CAD systems use the same naming convention, and not all designers use default stack ups. We do our best to interpret the data sent, but we would rather place an order on hold for verification rather than guess.
2. Not all layers were uploaded
   We regularly have missing files, most notably outline layers and/or NC drill files. We will occasionally be able to find outlines on other/multiple layers of the design; however if the size does not match the size ordered, we will likely hold the order to verify. We do not generate drill files from drawings.
3. Ordering an incorrect product
   During the course of processing orders, we will find the number of layers ordered is incorrect. In most cases, a double-sided board is ordered, and files for a 4-layer board are submitted. This results in cancellation of the current order, and placement of a new order with updated parameters.
4. Holes too close together (blowouts)
   When holes are placed to close together, this may cause drill bits to break. As a result, we may remove some holes from your design if they are perforation holes, or place the order on hold if the number of “blowouts” is excessive or will cause issues with the board design. Please remember to account for the fact your drilled hole sizes will change.  Drilled holes with less than 0.006" between them are too close.  Please allow a minimum of 0.016" between holes in your design files.
5. File Conversions/Native File Upload
   For our Quickturn service, we send an approval for all 4 and 6 layer designs, which can delay your order. Additionally, you need to make sure any necessary information is specified, such as layers in the design file that are necessary to create board layers completely. This is most often an issue for EAGLE software users and silkscreen files, but may be present depending on your software and usage. These types of issues may result in non-functional or non-conforming boards that require a repair or additional build.