Browse Month: July 2016

Make A Difference With www.pcbnet.com PCB Materials

There are PCB designers and fabricators who find choosing the appropriate materials for the construction of a printed circuit board unimportant. For those familiar with design issues, choosing the appropriate materials for a printed circuit board (PCB) makes the difference between a high performing PCB and an inferior one. Who would want a poor-performing creation? You create to bring out the “wow” factor in your creation. In this case, the printed circuit board for a design idea.

Careful consideration is critical in choosing the materials for a circuit board. Hasty decisions on choice of PCB materials can cause system failures at the most unexpected time. Knowledge of the key features of PCB materials helps at the design level and in the lifetime use of the system.

The standard requirements for PCB materials are high reliability for end-use application and consistency in performance. Most PCB sources can provide various materials you need in PCB construction like the ones we offer here at www.pcbnet.com. A match between the circuit materials and the requirement of applications rests on obtaining the right combination of characteristics which results to excellent performance at a low cost.

Two factors in the selection of PCB materials

The success and reward of having the right combination of materials for PCB rest on the following: suitability for circuit fabrication, and compatibility with application requirements.

Fabrication issues

The fabrication of a printed circuit board, particularly in a multi-layered board, present challenges. Designers and fabricators can have a range of choice for materials used in bonding layers to form a multilayer PCB. But, materials differ in dissipation factor, dielectric constant, and processing temperatures. A challenge which one may encounter is the bonding of dissimilar materials that are incompatible. A match of dissimilar materials may lead to problems with reliability and may not withstand the thermal stress during PCB assembly.

PCB

Another challenge one is likely to encounter with PCB material is its capacity to withstand thermal stress during assembly processing. There are materials which may have good electrical performance but contain features that are not strong enough to withstand the thermal stress of PCB assembly. A combination of the right materials could produce good multilayer PCB construction. This kind of construction is known as the hybrid multilayer PCB which are cost-effective but best performing.

There are various materials one can choose based on fabrication issues:

• Ceramic-filled hydrocarbon material with woven glass

• Ceramic-filled PTFE with woven glass

• Micro fiber glass PTFE

The materials mentioned have their specific use, benefits and drawbacks. Your material source has guides for specifications and use. You can find good and reliable sources for various materials that you can combine to make a good match. One source is our own site www.pcbnet.com.

End-use application

End-use applications, like fabrication issues, pose several concerns that affect PCB construction. Here again, guides are given by reliable PCB sources for the best selection of materials based on end-use application. The performance parameters considered would include: dissipation factor (Df), dielectric constant (Dk), CTE, and thermal conductivity. There are reliable tests done to determine dielectric losses in terms of design, process, and tolerance values.

Another performance parameter of concern based on end-use application is the conductor losses. The conductor losses are important in comparing circuit materials. The conducted losses may happen due to the circuit design, configuration, thickness of conductive metals, and surface roughness of copper conductor layers.

PCB Assembly

Thermal conductivity is another cause for end-use application concern. Thermal conductivity is the capacity for the heat to move through a circuit material. This parameter is crucial for high-power applications which need a high amount of heat to dissipate. If the thermal conductivity is found mismatched or insufficient, this can improve with the use of an appropriate material, such as the ceramic-filled high-frequency materials. This type of material can help resolve many thermal management concerns.

One parameter that is of concern, particularly for high-frequency applications, is the amount of moisture absorption of the PCB material. High humidity in the environment could cause the to Dk losses that impact on PCB performance. There are, however, materials built to resist and reduce moisture absorption to less than 1%.

The effect of a poor choice of materials for PCB construction can affect the PCB performance to a great extent. In selecting the right material for the PCB construction, consider the issues you will encounter in the process of assembly and pick the materials which offer the best trade offs. If you are looking for an expert advice regarding PCB, then look no further than www.pcbnet.com. You can expect us to give you expert advices and consultation at low prices.

Pcb fabrication

Sources of PCB materials provide charts that you can refer to in comparing properties of high-frequency materials. The chart can help simplify your choices in getting the best trade offs between fabrication benefits and excellent performance.

The choice of PCB materials is a thing of deep concern for a serious fabricator. The quality of the material you use for the PCB fabricator can either prove the superior capability of your PCB design or demonstrate poor performance. With a poor performing PCB, you may have to redesign and go through the whole process which translates into time lost and increased cost. Luckily, there is now www.pcbnet.com, and we are here to ensure that your PCB design, assembly and fabrication project will turn out to be a huge success.

The Origin Of Custom Challenge Coins

Challenge Coins 4 Less has been producing custom challenge coins for years. Throughout the years that we have dedicated to produce high-quality customized coins, we’ve witnessed the importance of our coins to every organization.

You might be wondering why custom challenge coins are used today. It has been used to give recognition to people who have done something exceptional. You might even have received something like this since these coins are given as awards or tokens of appreciation, or even as a form of identification of members who belong to a certain organization.

custom challenge coins

It had been widely used in politics and even in Hollywood. The use of these coins are even more prominent in every centralized organization that hierarchically functions, some of these are police departments, fire station department, military, and even in corporations.

The History Of Custom Challenge Coins :

The history of its purpose and existence is not clear yet. However, there are some stories that tell how custom challenge coins have begun. In every story you would notice that challenge coins have already been used as tokens for recognition of as symbols to identify the members of certain organization.

There are several stories that tell how these coins have played its part in history. The earliest among these stories was dated back during the ancient times when the Roman soldiers were given customized coins as form of recondition for their effort and valor.

The Roman soldiers would go into the battle and receive their salary once they came back from the battle. Aside from the salary, they were given customized coins that bore their legion’s insignia.

Military Coins

These customized coins are can be used to purchase anything they want. However, the Roman soldiers have chosen to keep their coins as souvenirs instead of using them to buy the things they want.

Another story, which is the most popular one, has dated back during the World War II. During that time, several young Americans volunteered to serve as soldiers to fight the war against Germans, along with their French ally. They were sent to France to do this mission.

In one squadron, there was a captain who was rich. He ordered several customized coins to give his men. Among these men was a young pilot. The young pilot kept his coin inside a leather pouch that was dangling around his neck.

Custom CoinsOne day, the young pilot was forced to land close to the German border due to his aircraft damage. Because of this, the Germans captured him and stripped everything that can verify his identity except the pouch that was hanging around his neck. The Germans did it to discourage the young pilot to escape.

However, this didn’t stop the young pilot from escaping. One night he escaped by taking advantage of the bombardment that was happening during that time. However, he left everything that could verify his identity.

During his escape, he was hiding from his enemies by disguising himself like a civilian. He did this until he reached the French outpost where he was captured again.

custom military coinsThe French soldiers didn’t recognize his accent. The young pilot had nothing that could prove his identity. Because of this, the French decided to execute him. Out of desperation, the young soldier reached for his coin inside his leather pouch and gave it to the French soldiers. The French soldiers recognized the insignia on the coin. Recognizing it as a symbol of an ally, they decided to postpone the young pilot’s execution. This gave them enough time to verify the identity of the young pilot, which was indeed their ally. Because of this mistake, the French soldiers gave him a bottle of wine.

Your challenge coins have gone a long way throughout the history. Because of this, these have been used for giving recognitions and awards for the members of certain organization. Our company is proud that we’re taking part of its legacy, by producing high-quality custom challenge coins that will last for a long time.

Custom Challenge Coins bear a unique unit or team symbol or motto which identifies the group. Click here www.challengecoins4less.com you can get best options that coins make them unique.