What is an SMT process / Assembly line?

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SMT stands for Surface-mount Technology, and it is comprised on 3 primary machines: Stencil Printer, Pick and Place Machine, and a Reflow Oven. All these machines work one after the other to automate printing CCAs, reducing labor costs and increasing production rates.

Below is a video outlining the process.

Stencil Printing Machine

​A stencil machine spreads solder evenly on the board through a customized stencil. After spreading the solder on the board, the machine cleans off the excess solder paste.

Automation Advantage:

• Dual squeegee for clean application
• Double-sided board capable
• Print rigid & flex circuits

Pick and Place Machine

​Electronic components are placed on circuit boards by a Pick and Place (PnP) Machine. 

Automation Advantage:

• Placement rate ≤ 4800 cph
• Placement accuracy +/-0.001”
• Improved quality with Error Recognition System

Reflow Oven Machine

​The solder material is heated up and melted in a Reflow Oven to make electro-mechanical connections with the electronic components.

​Automation Advantage:

• 4 vertical heating zones plus cooling zone
• 18” wide conveyor and 50” heated tunnel length

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References & Links:
www.ddmnovastar.com/smt-equipment

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