SMT laser stencil

SMT laser stencil

To ensure that this high efficiency SMT implementation process, you must use steel mesh that excipients.

Screen printing is the first step in the SMT process, in order to mold high accuracy, coating uniformity and efficiency in the entire automation process has an important significance. Screen printing is serigraphy (SCREEN PRINTING) and screen printing (SILK METHOD). Practical application to serigraphy based, serigraphy is a leak in the metal template carve through-hole solder paste or glue seal leak to the PCB pads.

SMT process now leak by chemical etching or lithography thick-film technology. Lithography mainly for fine pitch of LSI, such as 340 feet TQFP, etc., but the process is costly, chemical corrosion process is engraved Kong is widely used for the general sheet components and pitch of 0.5mm These QFP can achieve perfect results, but for less than 0.5mm pitch products, usually with a laser (LASER) method of production, the frequency of use as templates and more general use of stainless steel metal plates, companies generally provide customers with LASER technology and chemical corrosion stainless steel process:

1, frame material: Aluminum.

2, frame size: 370 * 470MM

3, the frame edge width: 30mm

4, the metal plate surface: Stainless steel

5, the most feet away: 0.254mm

1. Solder film; 2. Gerber files; 3. PCB bare board (any number of layers).

Generally only provide information on any of these three can, special requirements (frame size, process LASER) must first proposed.

Request for information:
1, the data format DATA FORMATS

We can receive a variety of CAD data formats: GERBER, HPGL, *. GWD, *. CWK, *. PWK, *. DXF, *. PDF,

And the following software design data: PADS2000, POWERPCB, PROTEL, AUTOCAD, CLIENT98, CAM350V.

2, V2001. Wherein GERBER format is a common data format, most software are GERBER format data can be output.

3, GERBER there are two types: 1) RS274D with XYDATA, excluding D-CODE file, the customer shall give the corresponding D-CODE file

RS274X with XYDATA, D-CODE is also defined in this document. 2) D-CODE file (APERTURE LIST)

The ASC Ⅱ text format, which defines a corresponding D-CODE different size, shape and the exposure mode.

Template data must contain SMT SOLDER PASTE LAYER (containing FIDUCIAL MARK data and PCB outline data), the proposal to transfer the character layer data in order to check the data for positive and negative, component class and other information.

2, data compression: excessive data transfer should be compressed, you can use *. ZIP, *. ARJ, *. LZH and any other compression formats

3, PCB, film can coordinate machine (mining point machine), GuadScan system automatically generates GERBER files.

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