PCB is an important electronic component, support for electronic components, and a carrier for electrical connection of electronic components. In the process of PCB manufacturing, blackening will occur. What are the main reasons for the blackening of the gold plated circuit board? 1. Electroplated nickel layer thickness control Gold plating on gold-plated circuit board is…
Polyester resin adhesive Polyester resin film thermoplastic adhesive is a high yield and low-cost material that can be rolled and processed. It can be made into heat-resistant material with copper sheet and conforms to the specification of ul-94vtm-0. It can’t pass drift tin test, the biggest using temperature is 110 ℃. Polyester resin adhesives are…
High Tg means high heat resistance. General Tg board for more than 130 degrees, high Tg PCB generally greater than 170 degrees, medium Tg is greater than 150 degrees. With the rapid development of electronic industry, especially electronic products represented by computer, the development towards high function and high multilayer requires higher heat resistance of…
High frequency PCB wiring design principle 1. Minimize logical fan out, preferably with only one load. 2. Avoid using a thorough hole between the output of the high-speed signal line and the receiving end as far as possible to avoid the cross of the pin figure. Clock signal lines, in particular, require special attention. 3.…
Digital devices are developing towards the direction of high speed, low consumption, small size and high anti-interference, which development trend puts forward many new requirements for the design of high frequency PCB. Based on years of experience in hardware design, the author summarizes some rules of arrangement of high frequency PCB components. Rules of arrangement of high…
Wiring high frequency PCBs requires careful consideration of signal integrity, impedance matching, and minimizing electromagnetic interference (EMI). Here’s a practical guide to wiring high-frequency PCBs: Layer Stack-up: Choose a layer stack-up that minimizes signal losses and provides controlled impedance. Typically, high-frequency PCBs have dedicated signal layers and ground planes to manage return paths effectively. Impedance…
Aluminum printed circuit board composition. 1. Circuit layer The circuit layer (generally using electrolytic copper foil) is etched to form printed circuit for the assembly and connection of devices. Using the same thickness and wire width, the printed circuit board can carry higher current than the traditional fr-4. 2. Dielecric layer Dielecric layer is the…
Aluminum printed circuit board (PCB) is a unique metal base copper clad board, PCB aluminum substrate has good thermal conductivity, electrical insulation and mechanical processing properties. Features: Aluminum printed circuit board surface use mount technology (SMT); PCB aluminum substrate has good heat dissipation performance in the circuit design scheme; Aluminum printed circuit board can reduce…
Aluminum printed circuit board (PCB) is a kind of PCB: Aluminum printed circuit board (PCB) is a kind of metal base copper clad board with good heat dissipation function. Generally, a single panel is composed of three layers, which are circuit layer (copper foil), insulation layer and metal base. For high-end use there is also…
Except for some materials, materials used in double-sided flexible PCB are basically rolled. As not all processes must be processed by the tape winding process, some processes must be cut into sheets before processing. For example, the drilling of metallization holes of double sided flexible PCB can only be carried out in the form of…
There are a variety forms of flexible printed circuit boards, even if it is a single sided structure, its covering film, reinforced plate material and shape, the process will change greatly. A seemingly simple single sided flex PCB may have more than 20 basic processes. Double-sided flexible PCB has two conductive layers, which can obtain higher…
Aluminum substrate PCB is made of aluminum substrate, due to its strong heat dissipation ability, so most are used in LED lighting products. The single panel of aluminum substrate is composed of three layers: circuit layer, insulation layer and metal base layer. The structure of the double panel is composed of circuit layer, insulating layer,…
Copper prototype board is a kind of thermal conductivity than aluminum substrate and iron substrate are many times better metal substrate, suitable for high frequency circuits and high and low temperature change of large areas and precision communication equipment heat dissipation and construction decoration industry, generally sunken gold copper substrate, silver copper substrate, tin copper…
Copper prototype board quality reliability to king board laminate for good, Copper prototype board is one of the most expensive metal substrates, heat dissipation effect than aluminum substrates and iron substrates are many times better, suitable for high frequency circuits and high and low temperature change of large areas and precision communication equipment heat dissipation…
Hard gold plating PCB, also known as selective gold plating or gold plating, is a process of electroplating a layer of nickel and then a layer of gold on the required PCB pads. It is called selective because it only applies to some of the PCB pads that need it, such as edge connectors or…
Electroplating can be divided into hard gold and soft gold. Hard gold electroplating is an alloy, so its hardness is relatively hard. It is suitable for use in places requiring force and friction. It is generally used as the edge contact point of PCB ( commonly known as golden finger ). Soft gold, On the…
