A carrier of an integrated circuit board is mounted in an integrated circuit . But often say the integrated circuit boards also bring. IC Banzhu have silicone composition, it is generally green.
Brief introduction
A semiconductor integrated circuit board production process, the production of a small silicon chip, many transistors and resistors, capacitors and other components, or method in accordance with the multilayer wiring to the wiring part tunnel into a complete electronic circuits. It is used in the circuit letters "IC" (also useful for text symbol "N", etc. ) representation.
IC board schematic
What is the principle of circuit boards ? Many people do not know what the principles are integrated circuit board. IC is an integrated circuit board carrier, IC (integrated circuit, called the integrated circuit RTHK) is a micro- electronic devices or components. Using certain process, to a desired circuit transistors, diodes, resistors, capacitors and inductors and other components and interconnecting wiring together, formed on one or a few small pieces of the semiconductor wafer or a dielectric substrate, and then packaged in a tube shell, a miniature circuit structure having a desired function; wherein the structure has all the components form a whole, so that the entire volume of the circuit is greatly reduced, and the number of welding points and the lead is also greatly reduced, so that the micro toward miniaturization, low power consumption and high reliability, a major step forward.
Features integrated circuit board
Circuit boards with small size, light weight, low lead and solder points, long life, high reliability, performance, etc., while the low cost, ease of mass production. It is not only widely used in industrial and consumer electronic devices such as tape recorders, televisions, computers, etc., while in the military, communications, remote control, etc. have also been widely used. Mounting an integrated circuit to an electronic device, the mounting density can be increased several times than the transistor to several thousand times, stable operation time of the device can be greatly improved.
Classification
1, Press the functional structure
Circuit boards according to their function, different structures can be divided into analog and digital circuit boards into two categories. Simulation is used to generate , amplify and process a variety of analog signals ( refer to the magnitude of the frontier with time -varying signals such as audio signal transistor radios, tape recorders signals, etc.), and the number used to generate, amplify, and a variety of digital signal processing ( refer to the on time and amplitude values of the discrete signal such as an audio signal and a video signal VCD, DVD playback ).
2, Press the production process
According to the production process can be divided into semiconductors and thin film. Thick and thin film membrane and classification.
3, Press the level of integration
According to the level of integration can be divided into small, medium size, large-scale and ultra large scale.
4, Press conductivity type different
By conductivity type can be divided into bipolar and unipolar.
Bipolar production process complicated, large -power, representatives TTL, ECL, HTL, LST-TL, STTL other types. Unipolar production process is simple, low power consumption , ease into a large-scale , representatives CMOS, NMOS, PMOS and other types.
5, Press Use
Use can be divided into the TV with. Audio available, DVD machine, VCR, computer ( PC) to use, keyboard use, communication, camera use, remote control, language, and various special alarm Used.
TV by including horizontal and vertical scanning, medium, sound, color decoding, AV / TV converter, switching power supply, remote control, NICAM decoding, picture in picture processing, microprocessor (CPU), memory, etc.
Sound by including AM / FM high-frequency circuits, stereo decoding circuitry, audio preamplifier circuit, audio operational amplifier, audio power amplifier, surround sound processing, level drive, electronic volume control, delay reverb, electronic switches.
Discs with machine control systems, video encoding, MPEG decoding, audio signal processing, sound effects, RF signal processing, digital signal processing, the servo motor drives.
VCR has a control system, servo drive, audio processing, video processing.
Production process
1, Print circuit board. Will draw a good printed circuit board with iron-on transfers, pay attention to slippery side facing you, general printing two circuit boards, that piece of paper to print two circuit boards. In which you select the best printing circuit board production.
2, CCL-plate cutting board full graphic production. CCL, which is coated on both sides with a copper film circuit board, cut to the size of the copper-clad circuit board, not too large, in order to save material.
3, pretreatment CCL. With fine sandpaper to polish the surface oxide layer CCL out to ensure that when the circuit board transfer, thermal transfer paper, the toner can be securely printed on CCL, a good polished surface bright standard plate, no significant stains.
4, the transfer board. The printed circuit board cut to the appropriate size, the printed circuit board attached to the side of the CCL, CCL align well placed after the transfer machine, when placed on transfers must ensure there is no dislocation. Generally 2-3 times after the transfer, the board will be able to transfer it firmly on the CCL. Heat transfer machine beforehand had been preheated, the temperature set at 160-200 degrees Celsius, pay attention to safety due to the high temperature operation!
5, corrosion PCB reflow machine. First check whether the transfer complete circuit board, if the minority is no good place to transfer oil pen with black patches. Then you can corrode, and so when the copper film exposed circuit board completely eroded, the board removed from the etching solution to clean, such a circuit board on the corrosion better. The composition of the etching solution of concentrated hydrochloric acid, hydrogen peroxide, water, the proportion of 1:2:3, in the preparation of the etching solution, the first drain, plus concentrated hydrochloric acid, hydrogen peroxide, if the operation of concentrated hydrochloric acid, hydrogen peroxide or an etching solution does not Carefully splashed on skin or clothing should be promptly cleaned with water, due to the use of highly corrosive solution, we must pay attention to safety when operating!
6, circuit board drilling. The circuit board is to insert electronic components, so they are on the circuit board drilling. Select electronic components based on the thickness of different pin bur when using the drilling rig, the board must act in stable rig slow speed can not be opened, the operating rig is quite simple, can be done very well as long as careful . Please see the operating personnel to operate carefully.
7, circuit board pretreatment. After drilling, use fine sandpaper to cover the circuit board toner polished off with water to clean circuit boards. After the water dried, coated with pine fragrance line side there is just a thin layer, not only to prevent oxidation of the line, but also a good rosin flux, in general, the surface of the circuit board pine fragrance will be within 24 hours solidification, to accelerate the solidification of rosin, we use hot air heating circuit boards, only 2-3 minutes rosin can solidify. Hot air temperatures up to 300 degrees, not toward the outlet when using flammable, and the small animals, or a request for safety first ah!
8, for soldering electronic components. After the board for soldering electronic components, power, function realization, the production is completed.
Integrated circuits and circuit boards differences
IC replaced the transistor, for the development of the various functions of electronic products paved the way, and dramatically reduce the cost, the third generation of electronic devices from on stage. Its birth, the emergence of the microprocessor has become possible, but also to ordinary computer into an everyday tool can get close. Application Integration technology spawned more convenient electronic products, such as common handheld electronic calculator, Kilby Following is a new invention of the integrated circuit after.
Until today, the silicon material is still the main material of our electronic devices.
In 1958, Texas Instruments' Kilby young engineers working to come up with a good idea, not only in the manufacture of transistors on a silicon wafer, silicon also allows the incorporation of other different elements in a particular area can be controlled, be made to change its conductivity resistance; then plated with a metal capacitor formed in a specific area of the oxide layer formed on the wafer surface; circuit according to design requirements and to connect them to each other, so that a small piece of silicon wafer having an electronic circuit functions, known as integrated circuits, it is like a city under the microscope.
The integrated circuit of the invention is a revolutionary technology of electronic products, and further reduce the size of electronic devices, whereby they become lighter and smaller. Since most of the different electronic components can be fabricated on the same piece of silicon, closely linked to each other, thereby reducing the possibility of component failure and fracture of the lead, to improve the reliability of electronic equipment, but also reduces the manufacturing cost of the electronic products . In order to fully reflect the superiority of the integrated circuit, the people competing to improve the process, and strive to create more and more electronic components on the same size silicon. The early 1960s, making it only a small piece of silicon integrated circuit contains dozens of elements; late 1970s, people have been able to integrate 130,000 transistors in the area of 30 mm2 piece of silicon; Since the 1990s, the rapid development of VLSI technology, people have been able to on a fingernail-sized silicon chip making contains 5,000,000 transistors integrated circuits, it is functionally equivalent to 250 units in 1945, the invention of the computer , and then the first computer weighs 30 tons, to be occupied by two houses.
The invention of the integrated circuit, greatly reducing the cost of electronic products, miraculously reduce their size, leading to a home computer and cell phones have enabled electronic devices in the past in order to purchase specialized agencies may become a tool for public use.
Electronic devices with integrated circuit manufacturing of cheap, compact, reliable, convenient, people who admiration of electronic technology, the rapid expansion of their applications to many fields of human activity, making it a powerful means of conventional technology innovation, effectively improve the level of human activity.
About PCBway
Since 2003 PCBWAY has been the leading PCB quick turn manufacturer specializing in both Prototype and Production quantities, Initially produced single-sided and double-sided printed circuit boards for the consumer electronics market. PCBWAY is ranked among the top 4 board fabricators in asia and is well-known for its expedited turn time capabilities and its reliable best on-time shipping record.
Today, we have over 450 operators with high modern facilities to manufacture multi-layer PCB up to 12 layers. Backing up with a group of professional engineers, and well established quality system. PCBWay has grown to become a major PCB manufacturer in Asia to serve in diverse customers base such as electronics appliance, communication, educational electronics, power supplies, Automationsetc.
Our mission is to become one of leading PCB manufacturer that provide in high quality product with total customer satisfaction.
