盲埋孔设计时需要考虑的几个问题

Blind/Buried Via Considerations

Designs that contain blind and/or buried vias normally require a different drill drawing for each type of via being used.

To create different drill drawings

Run ncdrill legend once for each type of drill.

Note: Because each execution of the command overwrites the drill drawing from the previous execution, you must save a copy of each drill drawing after you create it.

The following diagram shows a cross section of a design with several types of through, blind, and buried vias. Below the diagram is a list of the type of drill drawings this example requires.

1. All through-hole pins and vias

2. Blind vias going from Top/Surface to Internal-1

3. Buried vias going from Internal-2 to Internal-5

4. Blind vias going from Internal-6 to Bottom/Base

Note: The subclasses that you have selected to be visible in the Color and Visibility dialog box will affect the output of the process.