The interconnection of various plates in electronic facilities often requires the use of PCB plug sockets with spring contacts and a matching preset printed circuit board with connected contacts.
Ordinary Tg sheet is above 130 degrees, High-Tg is generally above 170 degrees, and medium Tg is above 150 degrees. The Tg of the substrate has been improved, covering heat resistance, moisture resistance, chemical resistance, stability and so on.
The working principle of the circuit board is to use the board based insulation material to isolate the outer copper foil conductive layer, so that the current flows along the preset route in various components.
which is equivalent to reviewing the schematic diagram, modifying the scheme for design, and si simulation at the same time. There are many types of power supply with small voltage and large current on the board.
Flexible PCBS (FPCS) are increasingly needed, and PCB manufacturers are accelerating the development of thinner, lighter and more dense FPCS.
How to ensure quality in patch production: (1) Visual inspection refers to the method of inspecting assembly quality directly with the naked eye or with the aid of tools such as magnifying glass and microscope, (2) automatic optical inspection (AOI), (3)
How to clean pcba residual tin ball, 1, manual cleaning, 2, machine cleaning
High frequency circuit board is a special kind of circuit board with high electromagnetic frequency. Generally speaking, high frequency can be defined as frequency above 1GHz.
In the future market development, circuit board maintenance technology has been accepted by more and more people. Therefore, it also promotes the development of circuit board maintenance industry.
How to design PCB for SMT patch processing: 1. First determine the function of electronic products, performance indicators, cost and overall size of the overall goal, 2. Electrical principle and mechanical structure design, according to the structure of t
Prevention cost refers to the cost paid to prevent the occurrence of quality defects; Appraisal cost refers to the cost paid for testing, inspection and inspection in order to assess whether the product has the specified quality; Internal defect cost refe
Except for the elemental metals, the compounds are electric and have no good superconductors or even heat conduction (which is also the key to the formation of the route to disperse or propagate quantitative).
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