As long as the thru-hole components themselves can withstand the reflow oven temperatures, and there is enough clearance around the leads in the holes for the solder paste to be distributed, the reflow process can produce good solid solder joints on plated thru-holes.
Once the board has been prepared with solder paste and the components have been installed, it is ready to be reflowed. The board will travel through a series of industrial convection ovens that regulate different temperature levels to complete the entire reflow process. The board will first be heated to a specific temperature, and then held at that temperature to activate the flux in the solder paste in order to remove the oxides on the soldering surface.
Then the board will be heated again for the solder to reflow, after which the board will go through a cooling process to solidify the newly formed solder joints. We have the experience and the resources that you need to make sure that your design is manufactured to the highest levels of quality.
And to help you get started on the best path, we furnish information for your DFM checks and enable you to easily view and download DRC files. If you want more information on the different solder paste applications that we can provide for you, contact us. Tempo Automation Inc. Learn More. Download Now. Solder Paste Grades According to Particle Size Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 Type 7 Type 8 um um um um um um um um Once the solder paste has been decided on, the next step is getting it applied to the circuit board.
Accurate quote in less than 1 day. Performs entire turnkey process in as fast as 3 days. Emphasizes DFM to eliminate time-consuming back-and-forth design corrections.
Sources components from the most reputable suppliers in the industry to reduce procurement time. Performs multiple automated inspections during assembly to ensure PCB quality for prototyping. Provides support throughout the PCB manufacturing process, beginning with design.
Smooth transition from prototyping to production. Before you have used the solder paste, storing it is as simple as placing it in your tool bag. After opening it, however, you need to make sure that you are taking care of the paste properly. It could easily lead to wasted solder since the material can dry up if left opened. Store it in an airtight container so that oxidation cannot occur.
Solder paste all forms of solder for that matter do not work well in hot temperatures. Make sure that you are storing it at low temperatures. This keeps the flux lasting longer at a higher quality. It also helps prevent oxidation. It's imperative that you do not use your solder paste past the expiration date since the product does degrade even when kept in the best storage conditions.
The Solder Paste Printing Process. Posted: November 20, Categories: Soldering Articles. Author: Neoden USA. The Grading System The grading system is a way for you to figure out which paste will work for the job you want to complete.
Where to Purchase Solder Paste Specific electronics solder paste can be bought either in bulk quantities for those looking to open a PCB assembly plant , or in smaller quantities.
The most common packages that they come in are tubs and syringes. This schematic will then be used to design a digital layout of the printed circuit board, referred to as a Gerber file see figure 2. The size of the printed circuit board is most often determined or limited by the available space in the finished product, and the size of the surface mount devices will be determined by the available space on the printed circuit board.
This is why the right solder paste procedure is critical. As electronic devices get smaller, they require designs that take full advantage of the space available. Smaller boards typically require smaller surface mount devices, that have smaller footprints. So, the board layout will have smaller pads for mounting.
As spatial tolerances shrink, precision placement of surface mount devices becomes more critical.
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