PCB knowledge

//PCB knowledge

We can produce rigid printed circuit board, High Density Interconnect pcb, Heavy copper board, High Frequency pcb/RF PCB & Ceramic PCB & Rogers PCB & Teflon PCB factory in China, now we can help customer do PCB assembly, Board assembly and DIP assembly services.

PCB&PCBA E-test fixture

The fixture or shelf used for testing is called a E-test fixture; the test racks we know here are for PCB and PCBA. What raw materials do you need? Acrylic plates, locating posts, ejector pins, cards, leads, etc..In order to select according appropriate materials to produce the E-test fixture We need to choose it based on the actual situation, it can greatly reduce the cost, at the same time a general base night repeated use can greatly reduce the cost, and make the E-test fixture making standardization, convenient production, improve the quality of the E-test fixture. The selection of test [...]

2020-06-19T11:27:04+00:00Categories: PCB knowledge, PCB News|

RF PCB Layout: Interconnect Losses

Your trace geometry and layer stack will have a major effect on signal integrity as you route high frequency analog signals throughout your board. Newer designers will likely default to a microstrip geometry, possibly with guard vias to provide isolation between different circuit blocks and to suppress radiated emissions. The question of which trace geometry to use is about more than isolation; it is also about avoiding losses due to dielectric absorption, roughness losses, and scattering from your PCB substrate. The alternative to using microstrip transmission lines is to use stripline transmission lines. Routing striplines on a dedicated interior layer [...]

Mpcb or metal pcb

Thermal substrates for high watt density SMT applications   Metal core thermal PCB (MCPCBs, MCB, IMPCB or IMS) are widely used in applications where a dense wattage calls for a good thermal heat dissipation. The thermal efficiency gained by a metal based board allows for downsizing designs and removal of hardware. To avoid short circuits, there is an electrical insulation between the copper traces/pads and the base metal using a tailored dielectric layers with high thermal conductivity.   Thanks to metal core PCB, power densities can be increased while components remain cool, increasing life and durability. It also allows modules [...]

Electronics Manufacturing Steps of PCBA Circuit Board

Let’s understand the electronics manufacturing process of PCBA in details: Solder Paste Stenciling First and foremost, the PCBA company applies a solder paste to the printed circuit board. In this process, you need to put solder paste on certain portions of the board. That portion holds different components. The solder paste is a composition of different tiny metal balls. And, the most-used substance in the solder paste is tin i.e. 96.5%. Other substances of solder paste are silver and copper with 3% and 0.5% quantity respectively. The manufacturer mixes paste with a flux. Because flux is a chemical that helps [...]

PCB assembly Defect Coverage Using Automated Optical Inspection (AOI)

PCB assembly Defect Coverage Using Automated Optical Inspection (AOI) Automated Optical Inspection (AOI), which is an automated visual inspection of a Printed Circuit Board (PCB), provides 100% visible component and solder-joint inspection. This testing method has been in use in PCB manufacturing for almost two decades. It plays a critical role in ensuring that there are no random faults in the assembly. The technique, which uses lighting, cameras, and vision computers, is incorporated in the assembly process to guarantee the highest possible quality throughout each phase of a product’s life cycle. The method enables fast and accurate inspection and can [...]

Ceramic PCB- Alumina Oxide (Al2O3) PCB and Aluminium Nitride (AIN) PCB

CERAMIC PCBs- Alumina Oxide (Al2O3) PCB and Aluminium Nitride (AIN) PCB With recent advances in the market, Ceramic PCBs have become a more viable option for PCB designers. With the continuing requirements for miniaturisation, microelectronics and high-power LED packages, the need for substrates capable of withstanding high operating temperatures, whilst offering outstanding thermal performance is a must. Ceramics have been widely used in electronics/electronic components for years due to their thermal, and mechanical advantages. With recent advances in technology and manufacturing capabilities, they are now replacing entire Ceramic PCBs. Since their introduction, Ceramic PCBs have received enormous attention from the [...]

Material Selection for High frequency PCB Fabrication

We mostly use high frequency laminates in high frequency PCB. However, these are often difficult to fabricate. Because they must maintain the thermal heat transfer of the application due to the sensitivity of the transmitted signal. So, we need special materials for high frequency PCB manufacturing. When you are selecting a material for High frequency PCB, you must keep the following in mind. Dielectric constant It is the ability of a material to store energy when we apply an electric field. However, it is a directional property which means that it will change with the axis of the material. So, [...]

The benefits of heavy copper PCB fabrication and PCB assembly process

Heavy copper PCB means the foil thickness of the Printed Circuit Board greater than 3 oz (100 microns or four mils) typically. It is usually used for high electric current supply or some power circuits that are used in the automotive business. It can also be designed in the outer layer or inner layer. The thickness of heavy copper can also vary depending on the manufacturer, but they offer the same purpose. You should always use the best heavy copper PCB with the right thickness because a poor PCB cannot pass the heavy current. So, using a poor quality PCB [...]

Flexible PCB Design – PCB Manufacturing – PCB Assembly

Flexible PCB  , Flexible Circuit  or Flex PCB assembly, is designed as a replacement for traditional wire harnesses, Is soft PCB board  compared with Rigid PCB assembly process. Flexible PCB can be manufactured as single-sided, double-sided or multilayer plated through printed circuit boards. This allows the complete wiring of compact devices and systems with the advantage that no additional cables or plug connectors will be required. Flex designs pose unique challenges for most PCB tools because traditional object checks don’t account for Flex check nuances. They present a new set of objects that are best accounted for during the design [...]

5 Questions to Ask PCB Manufacturer and electronic assembly services ltd

5 Questions to Ask PCB Manufacturer and electronic assembly services ltd With so many PCB manufacturers and PCB assembly suppliers to choose from, it's easy to feel overwhelmed with picking the right one. This may come as a surprise, but not all PCB manufacturers  and PCB assembly manufacturers are created equal.  In fact, by asking these questions before you choose a PCB manufacturer, you'll get to see firsthand how some manufacturers simply don't measure up to others. 1.How many years have you been in business? When it comes to manufacturing circuit boards, experience is everything. This question not only sheds light on a [...]