6 Layer Through Hole PCB Prototype Service Active Rogers Fr4 Circuit Board

6 Layer Through Hole PCB Prototype Service Active Rogers Fr4 Circuit Board

PCB Application - Multilayer Board
Multi-layer board: The required circuits are made on the front and back surfaces of multiple double-sided boards, and an insulating layer (Prepreg) is sandwiched between the two double-sided boards and then pressed together to form several layers of copper. The construction of the wire is usually an even number of layers due to the use of multiple double-sided laminates. The number of copper wires that can be made by multi-layer boards is the largest, and it is used in more complex circuits. At present, the motherboards used in computers mostly use eight-layer boards because of too many components. Generally, small electronic products, such as mobile phones, tablet computers, etc. Due to the requirement of small size, at least an eight-layer board is required. The more electronic components, the smaller the product size, and usually more layers of PCB prototype service are required.

1. Material
FR-4 (glass fiber epoxy resin substrate) is the most widely used material in the global electronics industry. FR is a code name for a flame-resistant material grade, which means a material specification that the resin material must be able to self-extinguish after burning. It is not a material name, but a material grade, so there are many types of FR-4 grade materials currently used in general circuit boards, but most of them are four-functional epoxy resin plus filler (Filler) and glass fiber. The composite material made. In recent years, due to the development of electronic product installation technology and PCB technology, FR-4 products with high Tg have appeared again. Tg degree (glass transition temperature - Glass Transition Temperature)

Example: ISOLA FR402, FR408, 370HR South Asia NP-140, NP-155, NP-175

Solder resist application in PCB assembly service

Areas that should not be soldered may be covered with solder resist (solder mask). The solder mask is what gives PCBs their characteristic green color, although it is also available in several other colors, such as red, blue, purple, yellow, black and white. One of the most common solder resists used today is called "LPI" (liquid photoimageable solder mask).^[48] A photo-sensitive coating is applied to the surface of the PWB, then exposed to light through the solder mask image film, and finally developed where the unexposed areas are washed away. Dry film solder mask is similar to the dry film used to image the PWB for plating or etching. After being laminated to the PWB surface it is imaged and developed as LPI. Once but no longer commonly used, because of its low accuracy and resolution, is to screen print epoxy ink. In addition to repelling solder, solder resist also provides protection from the environment to the copper that would otherwise be exposed.

PCB Prototype Service Capacities and Technical Specification

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