Due to electronic design It is an important activity in supporting the upgrading of Thai entrepreneurs to develop their own products using advanced technology in accordance with government policy. Electrical and Electronics Institute has established an electronic design center or Electronics Design Center (EDC) with the objective of providing design and development services for electronic circuit board prototypes (Printed Circuit Board or PCB) with industry standard quality as well as disseminate PCB design knowledge to entrepreneurs. Electronics design center (EDC) is located in FabLab Bangkok, inside the KX Knowledge Exchange building, which is a maker space for startups, researchers, and product developers. Come together to exchange, learn, and create innovations. They have access to advanced tools, equipment, and technology.

EEI Services / Electronic Design Service / Electronic Circuit Board Assembly Service (PCB Assembly)

For the assembly of the PCB by using a machine that has high precision in small lots and big lots with Surface Mount Technology (SMT) supported small devices (01005 inches or 0402 mm) by customer supply the component or using our company supply from domestic or abroad.

Scope of Assembly Services

1. The assembly line supports the single-side and double-side design.
2. Supports PCB sizes from 50mm × 50mm up to a maximum size of 450mm × 400mm.
3. Supports PCB thickness from 0.8mm to 2.3mm
4. Stencil support with 3 size 550mm ×650mm (21.65” ×25.59”), 650mm ×550mm (25.59” ×21.65”) and 736mm ×736mm (28.97” ×28.97”)
5. Able to be tested by following customer’s needs.

PCB assembly process steps

1. Solder Paste Stencil: The Stencil uses thin stainless steel with a stencil and is placed on the PCB that can use the solder in some parts of the PCB that is required. After removing the stencil, the solder will be remaining in the position.
2. Pick and Place: Place the SMD on the PCB in the direction of XY for placing the component.
3. Reflow Soldering: Welding of the device on PCB by heating will make the solder melt and harden for connecting to SMD with PCB.
4. Inspection and Quality Control: Common quality checking process.
   • Manual Check: Inspecting by eye this method will be efficient in small batches.
   • Automatic Optical Inspection: Inspection by using light by this method is used in large batches.
   • X-ray Inspection: X-rays are mostly used in PCB that have multilayers that are useful to see each layer and that help to identify the invisible problem.
5. Through-Hole Component Insertion: The PCB might have other components without a normal SMD. So that another solution is Plating Through a Hole (PTH) for the PTH needs special soldering in the process of assembly of the PCB.
   • Manual Soldering: The common method to set the component into PTH and soldering with soldering iron.
   • Wave Soldering: Commonly used in industrial settings by setting the component into PTH after that the PCB will be placed on the conveyer belt by passing through the soldering oven or reflow oven and the machine melts the solder at the bottom plate of the PCB so the solder will be flow on every PTH spot at the same time.
6. Final Inspection and Functional Test: Testing the function of the PCB and checking the characteristics of electrical such as voltage, current, signal output, etc.