Engineering is an industry that requires a lot of specialized knowledge and experience in technology and mechanics. Engineers are tasked with many projects, with one of the most important being design. Designs are the bottom level process, before a useful and complex product is built. Think about your computer, mobile device, and even your vehicle. Engineers were a crucial part of the design of each of these products.
The lengthy design process
Before an engineering product ever begins, there is a long design process. This design process might include input and feedback from other professionals on the team, besides the engineers. Many of the introductory designs are made on paper or on a comprehensive computer program. The legend is not printed until all team members agree and the product design has been finalized. Board designers use this computer aided design system with special software to then layout the circuit pattern on the board. The spaces between electrical conducting paths are often 0.04 inches (1.0 mm) or smaller.
What happens after the design process
After the design process is the printing process. This is a print of the entire legend. The legend will then be used to create a test project, usually with circuit board assembly. The prototype PCB assembly is an important part of the overall design process, as it gives engineers and other team members a chance to try out their designs. If the blueprint is successful, the entire legend will be placed onto the PCB prototype assembly.
If improvements are needed or there are problems with the legend and the design, the small batch PCB will likely go back to the design process and a new print will be needed. The problems might occur from problems with the design or problems with the legend. Problems caused by printing techniques also account for 70% of all surface assembly quality issues without consideration of PCB design or quality of components and printed boards.
Small batch PCB assembly
If the blueprint and legend prove to be successful, the legend will be fully assembled onto the circuit board. This circuit board assembly process can take some time, or if it is being printed in small batch PCBs, there may be a quicker turn around time. It is important to remember that this is just the initial prototype assembly. The entire purpose of the production is for testing purposes. If the design proves to be overall successful, a final product will likely be reprinted. If there are multiple layers in the PCB design, the small batch PCB may take even more tries to get it right.
Final PCB inspections
After the circuit board assembly is completed, a final PCB inspection will occur. This will inspect the design for any problems with the functioning. Because there are many problems that occur from each step in the process, these inspections are very important. Temperature is, perhaps, one of the biggest causes of problems at this point. Temperature curve plays a critical role in determining soldering quality. Prior to 160 degree Celsius, temperature rising rate should be controlled at 1 to 2 degree Celsius per second. If the temperature rises too quickly, on one hand, components and PCB designs tend to suffer heat too quickly, which can destroy components, leading to a deformation of the PCB design.
The engineering design and print process are very complex. A product that starts from a simple blueprint is then printed, prepared, designed, and assembled. When problems occur at each of these steps, the entire process starts over. This results in a lengthy design process. When the designs are especially complex, such as with phones, mobile tablets, and computers, the process can be extremely long to ensure high quality.
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