Design techniques of PCB proofing

Requirements for the work of the copper paving area:
Large area polyurethane circuit board sample solid brass, copper any grid or required distance boundary is more than 0.5 millimeter. The network does not require copper grid point size greater than 15milx15mil, set the plane set grid parameters in the network window (grid size) - (track width value) is larger than 15mil, the track width value is more than 10, if the network is not less than 15milx15mil copper mesh grid production in other parts of the circuit board to open in really should be covered with copper, setting: (grid size value) - (track width value) is less than or equal to -1mil.

Expression shape:
Shape processing drawings should be drawn on the Mech1 layer, such as the board of directors of the shape of the hole and groove and hole, drawing on the Mech1 layer, the best writing in the groove on the segmentation and size, considering the processing turning point and endpoint arc on the drawing hole and groove profile, square stone, and for processing CNC milling machine milling cutter back diameter is 2.4 m m, a minimum of 1.2 m M. 1/4 represents the turning point and the endpoint no arc fillet, should be marked with the arrow on the Mech1 layer, also marks the final appearance of the tolerance range.

The expression of a long hole with a pad:
Mech1 layers on long holes and two arcs are noted, considering the installation size.

The expression of metal and nonmetallic pores in the hole:
Generally no statement will not be made through the layer (multilayer) mat hole metal will be done, if not in the metal, use the arrow and text annotation Mech1 layer. Because of the square hole in the plate, the square hole, square hole, if the edge has already encircled copper foil, please explain whether or not metal. The traditional large holes and pads or non - gasket and non - electrical properties are regarded as holes of non metal holes.  The size of the inner hole of the foot square of the component.
The length of the square foot is less than 3 millimeters, you can use the round hole, the aperture size should be set to slightly larger than the (dynamic coordination) square diagonal value, it will not affect the setting to a long value, it cannot be assembled. Mech1 square feet with a generous shape of paint outline.
When many different pictures in the file, and want to split delivery in each panel to draw the border between 100mil distance is Mech1.

Minimum hole setting filling relationship:
When placing the components in the early foot diameter, pad diameter, hole diameter and hole diameter, so as to avoid the inconvenience caused by modifying the finishing line, we should consider the generic cabling module.  If the component pad finished hole diameter is set to x mil, pad diameter should be set to more than X + 18mil. X: welded diaphragm (our company's technical level, the minimum value of 0.3 millimeters). D: production of holes (usually X + 6mil) d: 8 pad diameter: (d-X) / 2: metal - Hongkong Nanlaiketa through hole set is similar to the pad: hole diameter greater than 0.3 mm, Hongkong pan is set to = X + 16mil.