PCB Gerber file introduction_

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PCB Gerber file introduction

source:Industry News release time:2022-11-01 Article author:yu Popular:pcb

　　 PCB Gerber file introduction(图1)

　　What is a Gerber file:

　　Gerber, also known as "light painting", usually represents only one format such as RS-274, 274D, 274X, etc., which serves as the two media for converting the designed graphic data into PCB manufacturing, namely a CAD-CAM data conversion format specification. The important use is PCB format drawing, and the final PCB manufacturing is completed by the PCB manufacturer. No matter what kind of CAD piecemeal, it is necessary to eventually convert the external CAD database into GERBER format files. In this process, Aperture table depicts the lens size, shape, and position information of a plotter. The transition between the two is usually tangible, and once Gerber occurs, the plotter is able to start the task. Plotters are expensive but accurate devices that can be accurate to less than 1mil.

　　The Gerber Format specification is important in two ways:

　　1)RS-274-D It is based on EIA RS-274-D code derived in 1985, and its material content includes word address materials and plotter parameters file and control code. The Gerber format must include an Aperture File, which means that the Gerber File and Aperture file are separate files. RS-274-D has been used for countless years. Due to the evolution of electronic products, the original RS-274-D format is gradually not enough to be used, and it is replaced by the enhanced version RS-274-X derived from it.

　　2)RS-274-X took place in 1992 and is the most popular material format today. It is an extension of RS-274-D, which is based on RS-274-D and is only the Aperture RS-274-X format integrated into the Gerber File, i.e., the "embedded D code".

　　In addition to the above, there are a few data format specifications in use or under development, such as MDA/Fire9000 and Barco DPF, which are not very commonly used and will not be detailed here.

　　Several common Gerber formats:

　　Gerber Format is a common material format between the electronics industry, it is used for design completion and on-line manufacture of PCB both bodies, just like the civil or mechanical hardware industry commonly used AutoCad software input DXF or HPGL format is common, is the designer to complete the design of the document and other fragmented link task materials.

　　This is finally developed by the American Gerber company for the company's consumption of optical plotter use, also known as Gerber Data. But because the Format can meet the needs of the electronics industry, so we are widely used to evolve into an industry standard material format, and then because the format is widely accepted by the electronics industry, gradually everyone is called Gerber Format.

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