PCB SPECIAL PROCESS

COPPER PLATED ON BOARD EDGE

A long slot along the edge of the board to be plated.

COPPER UP TO BOARD EDGE

It is called “edge plating” , which is the copper plating that runs from the top to the bottom surfaces of a PCB, and runs along one or more perimeter edges.

WAFER TEST BOARD

BLIND DRILL HOLES

N/A

VIA IN/ON PAD

DESCRIPTION:

Plated through holes filled with conductive (or non-conductive) epoxy plugging ink, subsequently planarized and plated over. The via in pad approach places a via directly under the device’s contact pads. This allows higher component density and improved routing. Consequently, via in pad provides the designer significant PCB space savings.

COUNTERSINK / COUNTERBORE HOLES

Countersink holes V.S. Counterbore holes

A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the surrounding material. By comparison, a counterbore makes a flat-bottomed hole that might be used with a socket-head capscrew.

COUNTERSINK HOLES VS COUNTERBORE HOLES

V figure Count-sink vs T figure Count-Sink:
A countersink is a conical hole that is cut in order to allow for a flat head screw to be used.
A counterbore is a cylindrical flat-bottom hole that is cut that also allows for a socket cap screw (has a flat head) to be used.

PLATED CASTELLATED HOLES

Plated Castellated Holes

PTH ON BOARD EDGE

Also called “castellated holes”. Castellated features are vias that are routed through to create half hole for the purpose of creating an opening inside the side of the hole barrel.

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