Hello readers welcome to new post. Here we will discuss Detail Overview SMT Assembly. SMT is stands for surface mount technology that used for creation different projects on the PCB board and for assembly. Through this technique components are assembled on the board. In this technique component are placed on the board in direct way. The device created through this technique is called SMD. Currently in place of through hole this technique is mostly used since reduced the expenses and offered the good quality. Component are connect on the respective portion of substrates.
The area covered by the SMT is less than the Through hole since it has small size leads and in some case no leads. With that comes with flat contacts, BGA. In this post we will look at details overview of SMT assembly and will tell you from which SMT providers you can get the services. So let get started.
Detail Overview SMT Assembly
- The assembly of SMT prototyping circuits is not considered as simple process and it need some specials category of devices.
- Through use of smt stencil the board of 0.3 millimeters pitch and 0201 dimension elements can be designed.
- Small scale elements are somewhat difficult to handle but mostly boards that are created on regular basis are manufactured through mechanical process.
- If you are on board to make through hand process then must used stencil in place of soldering.
- The stencil and boards that are employed in this projects are get from the well known PCB service provider JLCPCB.
- JLCPCB offered the best SMT and other PCB based features in reasonable prices that you can get very easily
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Layer PCB Size Qty Price 1-2 Layer 100x100mm 5 pcs $2 4 Layer 50x50mm 5 pcs $2 
The use of stencil helps to make the board assembly fast and easy over the soldering process.- Stencil helps to make components connection easy that are somewhat difficult to handle like BGA elements.
- Through use of basic component and using less work that use for single soldering every element can creates board which seems like to make through pick and place
Equipment’s and Supplies
- For assembly of board there is no need of any specials category of instruments. Hope you will equipped with some suppliers and can be get at cheap rates.
- This procedure is best for pupils and as well for engineers at professional level.
- With that for equipment’s and supplies there is need of lighted working area. So configuration of small elements can disturb your eyesight.
- At my work place i have three LEDs installed at my working area with that high magnify lamp.
- For creation of project there is requirements of solder paste and Henkel GC ten in T4 mesh is very finest paste. and it is lead free SAC305 solder.
- There is need of some nitrile gloves to remove the solder paste.
- For cleaning the solder paste there is need of isopropanol. It helps to clean stencil
- For application of paste there is need of squeegee.
- For holding the board accurately there is need for holding it. For that purpose there can be three dimensional printed as well laser cut 1/16 inches can be employed.
- After application of paste on the board there is need of tweezers to connect elements for that features swanstrom 7 SAH can be used.
- When components are connected on the board there is need of melting the solder. For that purpose there is toaster can be used.
PCB board Framing
- For framing the PCB board there is need of tight fitting at all sides to application the paste. All sides support will helps to support the stencil when it applied.
- I used masking tape that can be easy remove after completion of work
- There is need of tape at your stencil at place. For that purpose hinge can be used that holds stencil at accurate position.
- At backside there is need of some support so at back stencil should have accurate height.
Paste Applications
- For this choose the finest blob having solder paste at your squeegee that cover the complete dimensions.
- If there is high dense elements at your boards put difficult components firstly. Elements such as capacitors resistances must be connect at last.
- Large size components like inductors aluminum capacitors must position after connection other elements.
- Connection of components is very significant normally as elements pins link the solder paste orientation must be good.
- It also helps to make pins less components easy to fit.
- When every element is connect apply pressure to connect the paste accurate.
That is all about the Detail Overview SMT Assembly at Home. I have explained all steps that will helps you to make projects of PCB boards with SMT and also tell you how you can get SMT service from JLCPCB with good and reasonable prices and high quality features.
