Technical
How to Judge the Acceptance of PCB Quality
Which Color Circuit Board Sells the Most Expensive
Method to Solve the Noise Interference of Power Supply on High-frequency PCB Board
Disassembly Skills of Chip Components on PCB
What Factors Should Be Considered in the Selection of High-frequency PCB CCL
How to Place Special Components during PCB Layout
What Are the Functions of Capacitors in Circuits?
Testing Techniques for Common Electronics Components
What to do if There is a Short Circuit on the PCB
Desoldering Principles and knowhow during PCBA Processing
Black Oxidation of the Inner Layer of the Multilayer PCB
How to Ensure the High-performance Design of PCB
What Is the Printing Process of SMT Solder Paste?
PCB without fiducial mark, Is There Any Way to do SMT for It
What Are the Benefits of Reserving Break-up Tab for PCB Production
How Does SMT Affect PCB Production Time and Speed It Up
Classification of PCBs from three aspects
Common Problems and Solutions for Dry Film pasting during PCB Manufacturing process
Several Elements to Inspect after PCB Design
What is a halogen-free circuit board?
What Do Capacitive Coupling and Decoupling Mean?
What Are the Differences Between PCB Paste Mask and Solder Mask?
How PCBA Is Packaged and Shipped
How long can PCBA finished products be stored?
What Are the Differences and Relations Between PCB, PCBA, and SMT?
PCB Baking Specifications
PCB "Solder Mask Tenting" and "Solder Mask Opening"
Five reasons for PCB deformation and six solutions
Importance of first article inspection of PCBA board
Temperature zone standard for SMT reflow soldering
Small and medium volume PCB manufacturers in China
The main reason for PCBA cleaning
For power filter, the more capacitors, the better?
What does PCBA programming mean?
Content of PCB incoming testing
What conditions must be met for PCB circuit board soldering?
What is Blind via and Buried via
PCBA Manufacturers Temperature and Humidity Sensitive Components Management
Why choose Shenzhen SMT processing factory?
How long does it take to calculate the quotation for PCBA manufacturing?
Introduction of PCB design clearance requirements
Explanation of BOM, DIP, SMT, SMD
Introduction of the process of PCBA prototype
How to prevent pseudo soldering or cold soldering defects in PCBA manufacturing?
Factors that affect the Price of FPCB
What information is required for SMT processing at PCBA factory?
Skills of using 0ohm resistor in PCB design
How to select a PCBA manufacturer
SMT processing solder joint quality inspection
Characteristics difference between immersion gold PCB and gold plating PCB
Common malfunctions of Circuit Board Caused by Moisture
A Few Rules about PCB Panelization
Compare of multi-layer PCB with single/double layer PCB
Why do we need to introduce so many subdivided GND
Difference between immersion gold boards and gold plating boards
Aluminum PCB structure
Classification of different GND in circuit
Why PCB baking is necessary during manufacturing process
The handle and precautions of OSP board in SMT process
How to choose capacitors for filter decoupling
How to choose filter capacitor for switching power supply
5 database need for SMT process
Function of three-terminal capacitor
Introduction of PCB OSP surface treatment
Method of inspecting the quality of SMT by step
How to find the short point between VCC and GND
Difference between 850nm and 940nm infrared LED
Component layout of PCB SMT DFM
Pad shape influence on the strength and reliability of the soldering joints
The difference between high temperature solder paste and low temperature solder paste
Introduction to manual welding processing
Manual visual inspection in PCBA processing
Characteristics of the conformal coating process
Difference between hardware engineers and software engineers
PCBA processing operation rules
China PCB upstream materials has continued to soar
Difference between serial buses and parallel buses
The key points of quality control in PCBA processing
Common causes of solder beading during SMT process
Analysis of the advantages and disadvantages of HASL PCB surface
Requirements for layout of components during SMT assembly
Selection of electronic components and CCL for PCBA
Performance and appearance quality inspection of components.
Quality and Reliability of SMT Chip Processing and Production
Coupling and decoupling function of capacitor
Two methods to connect digital ground and analog ground
Common sense in SMT process

PCB "Solder Mask Tenting" and "Solder Mask Opening"

Do You Know What PCB "Via Solder Mask Tenting" and "Via Solder Mask Opening" Refer to?

Regarding the point of "Via solder mask opening" and "Via solder mask tenting" (the usage distinction between PAD and VIA), many customers and design engineers often ask what this means when placing orders, which option should I choose for my file? Now the description of this problem is provide by China PCB manufacturer SYS Tech as follows:

We often encounter such problems, the design is seriously non-standard, and it is impossible to tell if it’s a pad or via usage. Sometimes the conductive hole is processed by the attribute of pad, and sometimes the key hole is processed by the attribute of via. The design of VIA attributes and PAD attributes is confusing, leading to wrong processing, which is also one of the problems that often appear in complaints. For circuit board production manufacturing plants, when processing CAM data, some engineers who deal with film, because the customer’s design documents are not standardized, and they will make the same mistakes as the customers’, help customers modify the documents, make the non-standard design right, and process the engineering data based on their own experience, which contributes to the non-standard design of customers. Hereby explain: The last time you did the right thing does not mean that your file is right! All engineers must pay attention to design standards and specifications! Strictly require all the film processing engineers to maintain the status quo of customer’s files as much as possible! Try to deal with the design specifications and standards as much as possible, not according to the so-called experience! Reflect the problems, so that you can be a reference for other design engineers, improve the design quality and reduce the occurrence of problems!

1. During the via outputting process, the design is not standard or you are not clear about the outputting Gerber setting rules, which causes problems. When you send a Gerber file, the PCB factory cannot tell which are vias and which are components holes. The only thing that can be identified is to process according to the file. If there is solder mask, there will be mask opening! A point in dispute: “I want via solder mask opening, but you have made via solder mask tenting now, which may cause short circuit.” “Then please check your file. The Gerber you have given is a film file. And the factory has no way to check whether holes in Gerber files are conductive holes or key holes. Please check the Gerber file to see if it has solder paste layer. If so, solder mask opening; If not, solder mask tenting.”

2. The pad and via are mixed together, causing problems

(1). If your file is outputted by PADs or PROTEL, when you send Gerber file to the factory and ask for via solder mask tenting, please carefully check whether your plug-in hole (pad) is also use via attribute, otherwise your plug-in hole will be covered with soldermask, which will result in non-soldering. A point in dispute: “the plug-in hole must be plated with tin on it. How do you make it tented?” “Please check the file when you say this. Is it pad design or via design in your file?”

(2). If your file outputted by PROTEL or PADs, when you send the file to the factory, order requirement is via solder mask tenting. Many customers use pad (plug-in holes) to indicate conductive holes, which will make your conductive holes opening. Maybe what you want is via solder mask tenting. At that time, the point in dispute will be: “what I want is conductive hole solder mask tenting. Why did you make it solder mask opening?” “Then please check the design in your file!”

Explain again as follows, if it’s via, deal with in via, if it’s pad, then just deal with in pad! Because no one will know which is the conductive hole or plug-in hole in your design, and via and pad is the only sign, please be clear!

3. How to design via solder mask tenting in PROTEL or pads! ——the following is the most standard way. If the design is standard, there will be no mistakes!

There is a tenting option in via attribute in PROTEL. If you check the option, it must be solder mask tenting. Then all you outputting are solder mask tenting. In pads, when you convert files, you need the method of via solder mask tenting: When outputting the solder mask, just click via under the solder mask top, which means that all are via solder mask opening. If you don’t click, that is, all are via solder mask tenting. To sum up as follows: if it’s pad, deal with in pad---this is the plug-in hole. As for via, you have two choices. If you provide the original file, PCB manufacturer will let you choose when you place the order. If you provide Gerber file, please check whether the Gerber file meets your requirements!