Top 100 PCB Manufacturers From China Report

Top 100 PCB manufacturers: Click Pic to View Online

The Reason Why HTD Shared Top 100 PCB manufacturers?

-Many  oversea PCB electronic company don’t know the China PCB industry.
-Some of China PCB manufacturers produce bad quality
-Better service from Top PCB manufacturers

Top 100 PCB manufacturers Report

Recent, there was a ranking about Top 100 China PCB manufacturers on wechat.
Jim want shared this report to all PCB purchase managers.

HTD Group Circuit Board Solution

Now HTD capabilities is ranking the 51th on the top PCB manufacturers report.
So HTD have more oversea customer.
If you want to place PCB, please mail to info@htdcircuits.com

The time of PCB manufacturer customers' reference

If you have experience in new products development, you may know the risk of a PCB manufacturing sourcing is really hard work.
This post we will discuss this topic.

To measure a good PCB manufacturer

You know, to measure a good PCB manufacturer have many factors.
But the customer references are the first factor.
Because you can from those cooperated customer to analysis.
What is the most hot sell PCB type and the PCB market share.

The time of PCB manufacturer customers' reference

This issue may most PCB purchase want to know.
Under HTD circuits experience, this is often done by a supplier before extending credit.
The same process can serve the end customers well.

Source: http://www.htdcircuits.com/how-can-the-risk-of-a-pcb-manufacturing-sourcing-decision-be-minimized-.html

The mechanical via that PCB manufacturer can be done

Why HTDcircuits discuss the smallest mechanical via?

This paper is focus on the smallest mechanical via.
In fact we have announce our PCB manufacturing capability.
And we have mention the smallest drill size.
There were many customers ask questions about the smallest mechanical via HTD can be done.
So we have to discuss this topic.

The mechanical via that PCB manufacturer can be done

If they are true vias where the finished size is NOT of any consequence, we say, “Why not call them out as +.003” minus the entire hole size?”
At that point I tell them that we can drill smaller and require less signal pad and anti-pad size, which opens the customer up for some routing for these fine-pitch parts. While we are at it, let’s talk about pitch. 
Many times, we are approached by customers talking about a specific pitch between mounts or pads, such as .4mm or .5mm pitch. 
Understand that without a design to see the via image data, it is difficult for a fabricator to properly understand what pitch means to the customer.
The pitch is the distance from the center of a given entity to the center of an adjacent entity.

The smallest mechanical via related to SMT

This can mean different things based on pad/mount size. Let me give you an SMT pad as an example:
A .5mm pitch means .0197” between the centers of two BGA pads or surface mounts. This seems like a very reasonable distance, given today’s circuit board geometries. 
However, what if the designed surface mount pad width is .015” wide? This would mean a .5mm pitch would leave only .0047” edge to edge between the mounts. 
This gives you little or no room to route a trace between mounts at that width and pitch.
Clearly as the pitch between parts decreases based on today’s shrinking chip footprints, the associated surface mount or BGA pad widths need to decrease as well to be able to route even a .003” or .004” trace between them.

Take roof-floor bat in PCB flatness Check

The good PCB supplier has a good final inspection of flatness

If you have chosen a good PCB supplier, the quality guarantee is necessary.
Due to not every one PCB plant can provide 100% final flatness inspection.
Most important is that the bat warping can affect PCB performance.
That's the reason why we should avoid this issue.
So this paper will focus discuss how China PCB manufacturer treatment the bat warping PCB issue?

Most PCB manufacturers Use the oven to bake bat warping

HTDcircuits experts told us that all warping PCB boards should take out.
Usually the worker will pick out those warping PCB into the oven.
Then the oven will be set back under pressure, and the temperature can be get 150 degrees Celsius.
The last step is cool the PCB board in nature under pressure.
The cooling step can use 3-6 hours finish.

Take roof-floor bat in PCB flatness Check

Then we should check those warping PCB boards after the oven process.
Difference PCB manufacturers have a difference final inspection method.
In HTDcircuits plant, take roof-floor bat in PCB flatness check.
Due to this PCB, check method can save part board.
Even some of the PCB board may be two to three times the baked pressures to leveling.

Consider warping scrapped during PCB manufacturing

Most of time the warping issue can handle.
And there were some special machine can be use warping PCB board.
Even those methods can help you handle most warping issue.
Also consider warping scrapped during PCB manufacturing.
If more involved with the technological measures to prevent warping of practice, not baked pressure also useless part board, can only be scrapped.

Source:http://www.htdcircuits.com/how-china-pcb-manufacturer-treatment-the-bat-warping-pcb-issue-.html

The second cooling method of HASL PCB manufacturing

HASL is short for hot air leveling PCB.

If you have visited a HASL PCB manufacturer, you will know that the temperature is the biggest problem should handle.
Because the temperature can be 250 degrees during soldering assembly.
So this paper will discuss the solution use by most HASL PCB manufacturers.

The first method use by HASL PCB manufacturers

We have known HASL PCB have high temperature during soldering process.
Usual the PCB assembly line worker will put the board on the marble or steel flat.
In order to natural cooling and make cleaning after processor.
This cooling method is the most simple, also the most widely used.

The second cooling method of HASL PCB manufacturing

You know some of HASL PCB manufacturers want to improve surface brightness.
The worker will put the soldering PCB board through cold water.
This is the most fast cooling method, but also must consider the warping change.
Because difference temperature has difference mechanical performance.
That's the reason why some big PCB manufacturer uses a special cooling machine.
This type sealing machine allows to mount on the bed for cooling air flotation.

Source: http://www.htdcircuits.com/how-to-cooling-hot-air-leveling-pcb-in-assembly-process-.html

The first step of multilayer PCB manufacturing material preparing

The aim of multilayer PCB manufacturing material preparing process

If you have know the stress of multilayer PCB laminated, you will understand the aim of multilayer PCB manufacturing material preparing process more clear.
Because the layer after pressing except stress is very important for its lifetime. This point may confuse by most new hands of PCB designer.
So HTD circuits want to more guys to know that better multilayer PCB manufacturing material preparing process, longer life time it is.
The preparing for multilayer PCB manufacturing material process is one step completely not omitted.

The first step of multilayer PCB manufacturing material preparing

Produce multilayer prototypes in complete take out after.
The multilayer PCB manufacturing material can through hot, cold, cut or milling off.
All those PCB manufacturing method should be flashing in the oven.
Because most of time the stress of the PCB manufacturing material have changed when the flash in the oven.

The second step of multilayer PCB manufacturing material preparing

We have know the stress of multilayer PCB manufacturing material will be changed when it flash in the oven.
But how to measure the stress or how to make the decision to finish preparing process?
From our decades PCB experts, flat baked 4 hours, 150 degrees Celsius to release the stress gradually in the plate and resin curing.
This is a very important step for multilayer PCB board.
Because this factor not only relate to its lifetime, but also affect its performance.

Source: http://www.htdcircuits.com/do-you-know-the-preparing-process-of-multilayer-pcb-manufacturing-material.html

Multilayer PCBs: The Amazing Invention of Electronics

Printed circuit boards, abbreviated as PCBs have become an integral part of the electronics world. They provide the users as a relief from the abstruse process of point-to-point wiring and circuit complexities. They have surely relieved us from buying plenty of wires and electronic equipment and have made our job much simpler by putting them on a short board. From day-to-day general electronic products to medical equipment, dedicated service equipment, and high-reliability products, everywhere we can see the undefeated usages of PCBs. So we can call it as a wonder of the modern electronics.

In accordance with the rapid growth of PCB usages, there has been also a transforming change in PCB production. Many electronic equipment manufacturers in china produce PCB as well, where there are some of them dedicating themselves solely to PCB production. There are various techniques of producing a frisky circuit from a lump of electronic components and a board. This wide variety of PCB manufacturing arts has been able to produce a number of different types of PCBs. The PCBs can be comprised of several layers. So on the basis of a number of layers included the PCBs have been categorized into two major parts such as one layered PCB and Multilayer PCB.

The multilayer PCB is different from double layer PCB, where both of the Sides of the PCB are printed with electronic component and wires. The multilayer PCBs are consisted of at least 3 layers of conductive materials.

The preparation of multilayer PCBs is somehow different than others. The alternating layers of core materials are pressed together to make the multilayer PCBs. The process is performed carefully to make sure that no air is stuck between the layers. The conductors are purely coated by resins for safety purpose. An adhesive element is used to stick the different layers together. The adhesive is properly melted before using and once it is used between the layers, it is cooled down. Multilayer PCBs are highly beneficial and popular among engineers. They can serve multiple tasks at one hand.

• The increased flexibility: If proper connections are made according to the need of a particular project the multilayer PCBs can be used to produce a wide variety of circuit combinations, thus increasing the flexibility of usage.

• Density: The increased number of layers can be a great step towards assembling a variety of different electronic components thus increasing the assembly density.

• Reducing the complexity: The multilayer PCBs have greatly reduced the job of wiring the components individually.

• Less space: As the components are tied together in a single PCB with multiple layers, the space of the circuit is reduced.

Source: http://www.htdcircuits.com/multilayer-pcbs--the-amazing-invention-of-electronics.html