Board Patch Specification

- May 28, 2018-

1 Circuit board Width ≤ 260mm (SIEMENS wire) or ≤ 300mm (FUJI wire); if automatic dispensing is required, PCB board width × length ≤ 125 mm × 180 mm

2 The shape of the puzzle is as close to square as possible. It is recommended to use 2×2, 3×3,... ...... but do not spell into a yin and yang plate.

3 Circuit Board The outer frame (clamping edge) of the puzzle should adopt a closed-loop design to ensure that the PCB puzzle will not be deformed after being fixed on the fixture.

4 The center distance between the small plates is controlled between 75 mm and 145 mm

5 There must be no large devices or protruding devices near the junction between the puzzle frame and the inner plate, the small plate and the small plate, and there should be more than 0.5mm space between the components and the PCB plate edge. Ensure the normal operation of the cutting tool

6 Make four positioning holes in the four corners of the outer frame of the puzzle, the hole diameter is 4mm±0.01mm; the hole must be moderate in strength to ensure no breakage in the process of the upper and lower plates; the hole diameter and position accuracy are high, and the hole wall is smooth without burrs

7 Circuit board Each panel in the panel must have at least three positioning holes, 3≤ aperture ≤ 6 mm, no wiring or patch is allowed within 1mm of the edge positioning hole.

8 The whole board positioning for the circuit board and the reference symbol for fine-pitch device positioning, in principle the QFP with a pitch of less than 0.65mm should be set at its diagonal position; the positioning reference symbol for the imposition circuit board should be used in pairs. , Placed at the opposite corner of the positioning element.

9 When setting the datum point, normally leave 1.5 mm larger non-resist welding area around the datum point

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