In order to get into the electronic products we need to understand the
circuit board, IC, MCU, CPU, chip production process, in deepening its
understanding.
Circuit board (Printed Circuit Board, referred to as PCB), also known as
PCB, PCB board, circuit boards, etc., is an important electronic
components, is the support of electronic components, is the electrical
component line connection provider. Traditional circuit boards, using
the printing etching inhibitor of the work method, make circuits and
surface, so called printed circuit boards or printed circuit boards.
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IC: To achieve some kind of function, the circuit unit can be
concentrated together, the English is called IC.SCM: is a minimal
system, can be programmed to achieve all the needs of the function, the
English is called MCU, the microcontroller, such as the use of
single-chip microcomputer, and then add a variety of peripheral
circuits, can make robots.CPU: Chinese call central processing Unit, is
an electronic product of the heart, such as your current computer, if no
CPU is dead.Chips: Abbreviations for integrated circuits.
Multilayer immersed Gold circuit board for each electronic product
field, is an indispensable component of electronic products. Electronic
components will be installed welding on the circuit board to achieve its
functional value. The most commonly used process is tin or nickel gold,
now mainly to introduce the role of nickel gold and advantages and
disadvantages.
First, the sinking gold process is covered in the plate welding plate,
as an important part, must be because nickel gold is very easy to solder
together with tin one of the materials, and nickel gold can also play
the protective pad copper skin will not be oxidized by air, corrosion,
play to protect the role of the circuit board, in addition to the nickel
gold process is now in line with the promotion of the environmental
requirements of various countries, immersion gold process is unleaded
process (lead-free multi-layer immersion gold PCB), customers can be
assured of the use of production. In addition, multi-layer sinking gold
circuit board process because it is chemical sinking gold, so covering
the surface of the solder plate is flat, so it is also very easy to
weld, especially now many high-precision PCB, processing requirements
are very high, if the welding bad caused the virtual welding, BGA is not
so easy to find the reason, causing engineers to adjust repeatedly is
also troublesome, so multi-layer circuit board sinking Gold technology,
generally can be very good to avoid this phenomenon, so now many
precision circuit boards are using the immersion gold process to do
only.
But the sinking gold craft also has a little shortcoming, that is the
cost will be more expensive than the general craft. As the company's
cost consideration, generally not very precise or demanding boards, can
choose to spray lead tin or lead-free tin.
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