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Time of issue:2020-07-15 00:00:00
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What are the advantages of SMT patch
What
In the previous article, we have mentioned the introduction of SMT, and we know that it is the most popular technology and process in the electronic assembly industry. The rapid development of SMT patch is due to its own advantages. The following Sanjing will take you to understand some of the advantages of SMT patch.
First of all, the first advantage is high assembly density, light weight and small size of electronic products. Chip components are much smaller in mass and volume than traditional perforated components. Generally, SMT assembly technology can reduce the mass and volume of electronic products by a large proportion.
The second is strong vibration resistance and high reliability. Why do you say that? The reason is very simple, because the electronic components are short or no leads, and are firmly mounted on the PCB surface, so the SMT patch has better vibration resistance and reliability. It is worth mentioning here...
See more information
In the previous article, we have mentioned the introduction of SMT, and we know that it is the most popular technology and process in the electronic assembly industry. The rapid development of SMT patch is due to its own advantages. The following Sanjing will take you to understand some of the advantages of SMT patch.
First of all, the first advantage is high assembly density, light weight and small size of electronic products. Chip components are much smaller in mass and volume than traditional perforated components. Generally, SMT assembly technology can reduce the mass and volume of electronic products by a large proportion.
The second is strong vibration resistance and high reliability. Why do you say that? The reason is very simple, because the electronic components are short or no leads, and are firmly mounted on the PCB surface, so the SMT patch has better vibration resistance and reliability. It is worth mentioning here...
SMT common defects and their causes
SMT
We know that whether it is SMT patch or PCBA production, there will be more or less bad situations. Today, Sanjing mainly takes you to understand the common defects and their causes in SMT.
Common defects in SMT mainly include: solder ball, tombstone, short circuit, offset, low solder/open circuit, etc. Below we will introduce the causes of these defects in turn.
1. Tin ball. 1. Before printing, the solder paste has not been fully warmed to thaw, or has not been stirred evenly. 2. If there is no reflow for too long after printing, the solvent will evaporate, and the paste will become dry powder and fall onto the ink. 3. The printing is too thick, and the excess solder paste overflows after the component is pressed down. 4. The mounting pressure is too large, and the downward pressure causes the solder paste to...
See more information
We know that whether it is SMT patch or PCBA production, there will be more or less bad situations. Today, Sanjing mainly takes you to understand the common defects and their causes in SMT.
Common defects in SMT mainly include: solder ball, tombstone, short circuit, offset, low solder/open circuit, etc. Below we will introduce the causes of these defects in turn.
1. Tin ball. 1. Before printing, the solder paste has not been fully warmed to thaw, or has not been stirred evenly. 2. If there is no reflow for too long after printing, the solvent will evaporate, and the paste will become dry powder and fall onto the ink. 3. The printing is too thick, and the excess solder paste overflows after the component is pressed down. 4. The mounting pressure is too large, and the downward pressure causes the solder paste to...
How to repair and maintain circuit boards in SMT chip processing and production
How
In the process of SMT chip processing, production and use, if there are processing errors, improper use or aging of components, it will cause abnormal operation of the PCB board or even poor use of the entire product. However, because many products only have problems with internal components, they do not need to be replaced all, which requires certain repairs and maintenance of the circuit boards in the products. So what are the specific steps? Let's take a look at the following Sanjing belts. 
The first step is to check the components. In the SMT chip processing plant, when the product needs to be repaired, it is first necessary to determine whether the components of each solder joint have errors, omissions, and reverses. At the same time, it should also...
See more information
In the process of SMT chip processing, production and use, if there are processing errors, improper use or aging of components, it will cause abnormal operation of the PCB board or even poor use of the entire product. However, because many products only have problems with internal components, they do not need to be replaced all, which requires certain repairs and maintenance of the circuit boards in the products. So what are the specific steps? Let's take a look at the following Sanjing belts. 
The first step is to check the components. In the SMT chip processing plant, when the product needs to be repaired, it is first necessary to determine whether the components of each solder joint have errors, omissions, and reverses. At the same time, it should also...
SMT static detection and protection
SMT
We know that the contact and friction between the human body and various objects can easily generate static electricity. During the SMT process, if you do not wear an electrostatic bracelet to contact the components, in addition to the human body may be slightly uncomfortable, the components The device is also easily damaged by static electricity. So the question is, how to detect whether there is static electricity? Let's take a look at the following Sanjing belts.
In general, we use SMT static detection equipment to detect whether there is static electricity, such as electrostatic potentiometers, megohmmeters, wristband detectors, etc., to detect static electricity at regular intervals. In addition to detecting static electricity, we must also do...
See more information
We know that the contact and friction between the human body and various objects can easily generate static electricity. During the SMT process, if you do not wear an electrostatic bracelet to contact the components, in addition to the human body may be slightly uncomfortable, the components The device is also easily damaged by static electricity. So the question is, how to detect whether there is static electricity? Let's take a look at the following Sanjing belts.
In general, we use SMT static detection equipment to detect whether there is static electricity, such as electrostatic potentiometers, megohmmeters, wristband detectors, etc., to detect static electricity at regular intervals. In addition to detecting static electricity, we must also do...
Phenomenon and causes of poor welding in SMT processing
Phenomenon
In SMT processing, the quality of welding plays an important role in the performance and quality of the product. Because of this, the phenomenon of poor welding is very common in SMT processing. So, what are the main phenomena of poor welding? Next, Sanjing will give you an introduction.
1. There are holes on the surface of the solder joints: mainly caused by the excessive gap between the lead and the socket.
2. Pad peeling: Generally, the pad is peeled off from the printed circuit board after being exposed to high temperature. This bad solder joint is easy to cause the failure of component disconnection...
See more information
In SMT processing, the quality of welding plays an important role in the performance and quality of the product. Because of this, the phenomenon of poor welding is very common in SMT processing. So, what are the main phenomena of poor welding? Next, Sanjing will give you an introduction.
1. There are holes on the surface of the solder joints: mainly caused by the excessive gap between the lead and the socket.
2. Pad peeling: Generally, the pad is peeled off from the printed circuit board after being exposed to high temperature. This bad solder joint is easy to cause the failure of component disconnection...
The role of flux in SMT patch processing
The
In SMT chip processing, we often use flux. What is flux? We know that in the welding process of SMT chip processing, it is necessary to clean the electric welding welding metal material and electric welding welding surface. In this process, the raw material of auxiliary components and solder paste is flux. It is mainly composed of additives, rosin, activator, film-forming agent, solvent and so on.
So, what are the specific functions of flux in SMT processing? The following Sanjing will give you a brief introduction:
①Remove oxides or other contaminants on the soldering surface of the SMT patch. The rosin acid in the flux can undergo a reduction reaction with the oxide film on the surface of the metal to be welded; the active agent in the flux reacts with copper oxide to finally...
See more information
In SMT chip processing, we often use flux. What is flux? We know that in the welding process of SMT chip processing, it is necessary to clean the electric welding welding metal material and electric welding welding surface. In this process, the raw material of auxiliary components and solder paste is flux. It is mainly composed of additives, rosin, activator, film-forming agent, solvent and so on.
So, what are the specific functions of flux in SMT processing? The following Sanjing will give you a brief introduction:
①Remove oxides or other contaminants on the soldering surface of the SMT patch. The rosin acid in the flux can undergo a reduction reaction with the oxide film on the surface of the metal to be welded; the active agent in the flux reacts with copper oxide to finally...
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