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.crs (file Extension)
Stencil printing is the process of depositing solder paste on the printed wiring boards (PWBs) to establish electrical connections. It is immediately followed by the component placement stage. The equipment and materials used in this stage are a stencil, solder paste, and a printer. The stencil printing function is achieved through a single material namely solder paste which consists of solder metal and flux. Paste also acts as an adhesive during component placement and solder reflow. The tackiness of the paste enables the components to stay in place. A good solder joint is one where the solder paste has melted well and flowed and wetted the lead or termination on the component and the pad on the board. In order to achieve this kind of a solder joint, the component needs to be in the right place, the right volume of solder paste needs to be applied, the paste needs to wet well on the board and component, and there needs to be a residue that is either safe to leave on the board ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solder Paste
Solder paste is a preparation of powdered solder in sticky Flux (metallurgy), flux paste primarily used to solder surface mount components onto printed circuit boards. It is also possible to solder through-hole pin in paste components by printing solder paste in and over the holes. The sticky paste temporarily holds components in place; the board is then heated, melting the paste and forming a mechanical bond as well as an electrical connection. Use Solder paste is typically used in a Stencil printing, stencil printing process by a solder paste printer, in which paste is deposited over a stainless steel or polyester mask to create the desired pattern on a printed circuit board. The paste may be dispensed Pneumatics, pneumatically, by pin transfer (where a grid of pins is dipped in solder paste and then applied to the board), or by jet printing (where the paste is ejected onto the pads through nozzles, like an inkjet printer). After paste printing, the components are placed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solder Stop Mask
Solder mask, solder stop mask or solder resist is a thin lacquer-like layer of polymer that is usually applied to the copper traces of a printed circuit board (PCB) for protection against oxidation and to prevent solder bridges from forming between closely spaced solder pads. A solder bridge is an unintended electrical connection between two conductors by means of a small blob of solder. PCBs use solder masks to prevent this from happening. Solder mask is not always used for hand soldered assemblies, but is essential for mass-produced boards that are soldered automatically using reflow or wave soldering techniques. Once applied, openings must be made in the solder mask wherever components are soldered, which is accomplished using photolithography. Solder mask is traditionally green, but is also available in many other colors. Solder mask comes in different media depending upon the demands of the application. The lowest-cost solder mask is epoxy liquid that is silkscreened thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CadSoft Computer, Inc
EAGLE is a scriptable electronic design automation (EDA) application with schematic capture, printed circuit board (PCB) layout, auto-router and computer-aided manufacturing (CAM) features. EAGLE stands for Easily Applicable Graphical Layout Editor () and is developed by CadSoft Computer GmbH. The company was acquired by Autodesk Inc. in 2016 who announced to support the product up to 2026 only. Features EAGLE contains a schematic editor, for designing circuit diagrams. Schematics are stored in files with .SCH extension, parts are defined in device libraries with .LBR extension. Parts can be placed on many sheets and connected together through ports. The PCB layout editor stores board files with the extension .BRD. It allows back-annotation to the schematic and auto-routing to automatically connect traces based on the connections defined in the schematic. EAGLE saves Gerber and PostScript layout files as well as Excellon and Sieb & Meyer drill files. These are standard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altium Limited
Altium Limited is an American multinational software company that provides electronic design automation software to engineers who design printed circuit boards. Founded as Protel Systems Pty Ltd in Australia in 1985, the company has regional headquarters in the United States, Australia, China, Europe, and Japan. Its products are designed for use in a Microsoft Windows environment and used in industries such as automotive, aerospace, defence and telecommunications. Its flagship product, Altium Designer, is a software for unified electronics design. Since August 2024, Altium is a subsidiary of Renesas Electronics. History 1985–1991: Early history The history of Altium dates to 1985 with the founding of Protel Systems Pty Ltd by electronics designer Nicholas Martin. He was working at the University of Tasmania in the 1980s. He saw an opportunity to make the design of electronics product affordable, by marrying the techniques of electronics design to the PC platform. The c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Würth Elektronik GmbH & Co
The Würth Group (, ) is a worldwide wholesaler of fasteners, screws and screw accessories. Würth expanded its range and today offers a full range of business equipment for craft businesses in a kind of supermarket of its own. Würth offers dowels, chemicals, electronic and electromechanical components, furniture and construction fittings, tools, machines, installation material, automotive hardware, inventory management, storage and retrieval systems. The group of over 400 companies across 80+ countries has been servicing the automotive, woodworking, metalworking, industrial and construction industries. Würth was founded in 1945 by Adolf Würth in Künzelsau, Germany. The company is family owned and has been run by his son Reinhold Würth since 1954. History Würth was founded by Adolf Würth (1909–1954), for the purpose of selling screws in 1945 in Künzelsau (hence the company logo, which consists of the family name and a W of two screw heads with cylindrical and round ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Through-hole
In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either by manual assembly (hand placement) or by the use of automated insertion mount machines. History Through-hole technology almost completely replaced earlier electronics assembly techniques such as point-to-point construction. From the second generation of computers in the 1950s until surface-mount technology (SMT) became popular in the mid 1980s, every component on a typical PCB was a through-hole component. PCBs initially had tracks printed on one side only, later both sides, then multi-layer boards were in use. Through holes became plated-through holes (PTH) in order for the components to make contact with the required conductive layers. Plated-through holes are no longer required with SMT boards for making the component connections ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filename Extension
A filename extension, file name extension or file extension is a suffix to the name of a computer file (for example, .txt, .mp3, .exe) that indicates a characteristic of the file contents or its intended use. A filename extension is typically delimited from the rest of the filename with a full stop (period), but in some systems it is separated with spaces. Some file systems, such as the FAT file system used in DOS, implement filename extensions as a feature of the file system itself and may limit the length and format of the extension, while others, such as Unix file systems, the VFAT file system, and NTFS, treat filename extensions as part of the filename without special distinction. Operating system and file system support The Multics file system stores the file name as a single string, not split into base name and extension components, allowing the "." to be just another character allowed in file names. It allows for variable-length filenames, permitting more than o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EAGLE (program)
EAGLE is a scriptable electronic design automation (EDA) application with schematic capture, printed circuit board (PCB) layout, auto-router and computer-aided manufacturing (CAM) features. EAGLE stands for Easily Applicable Graphical Layout Editor () and is developed by CadSoft Computer GmbH. The company was acquired by Autodesk Inc. in 2016 who announced to support the product up to 2026 only. Features EAGLE contains a schematic editor, for designing circuit diagrams. Schematics are stored in files with .SCH extension, parts are defined in device libraries with .LBR extension. Parts can be placed on many sheets and connected together through ports. The PCB layout editor stores board files with the extension .BRD. It allows back-annotation to the schematic and auto-routing to automatically connect traces based on the connections defined in the schematic. EAGLE saves Gerber and PostScript layout files as well as Excellon and Sieb & Meyer drill files. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pochoir
Stencilling produces an image or pattern on a surface by applying pigment to a surface through an intermediate object, with designed holes in the intermediate object. The holes allow the pigment to reach only some parts of the surface creating the design. The stencil is both the resulting image or pattern and the intermediate object; the context in which ''stencil'' is used makes clear which meaning is intended. In practice, the (object) stencil is usually a thin sheet of material, such as paper, plastic, wood or metal, with letters or a design cut from it, used to produce the letters or design on an underlying surface by applying pigment through the cut-out holes in the material. The key advantage of a stencil is that it can be reused to repeatedly and rapidly produce the same letters or design. Although aerosol or painting stencils can be made for one-time use, typically they are made with the intention of being reused. To be reusable, they must remain intact after a design ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squeegee
A squeegee is a tool with a flat, smooth rubber blade, used to remove or control the flow of liquid on a flat surface. It is used for cleaning and in printing. The earliest written references to squeegees date from the mid-18th century and concern deck-cleaning tools, some with leather rather than rubber blades. The name "squeegee" may come from the word "squeege", meaning press or squeeze, which was first recorded in 1783. The closely related "squeedging" was reportedly first used in 1782, in the Covent Garden Theatre, during the performing of the comedy '' Which is the Man?'' by Hannah Cowley. Window cleaning The best-known of these tools is probably the hand-held window squeegee, used to remove the cleaning fluid or water from a glass surface. A soapy solution acts as a lubricant and breaks up the dirt, then the squeegee is used to draw the now water-borne dirt off the glass leaving a clean surface. Some squeegees are backed with a sponge which can soak up soapy water fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electroforming
Electroforming is a metal forming process in which parts are fabricated through electrodeposition on a model, known in the industry as a mandrel. Conductive (metallic) mandrels are treated to create a mechanical parting layer, or are chemically passivated to limit electroform adhesion to the mandrel and thereby allow its subsequent separation. Non-conductive (glass, silicon, plastic) mandrels require the deposition of a conductive layer prior to electrodeposition. Such layers can be deposited chemically, or using vacuum deposition techniques (e.g., gold sputtering). The outer surface of the mandrel forms the inner surface of the form. The process involves passing direct current through an electrolyte containing salts of the metal being electroformed. The anode is the solid metal being electroformed, and the cathode is the mandrel, onto which the electroform gets plated (deposited). The process continues until the required electroform thickness is achieved. The mandrel is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
