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This article presents a typical manufacturing process of an electronic assembly.
Component manufacturing
Components such as resistors, capacitors and integrated circuits are generally made by specialized contractors. Integrated circuits are generally made by the process of photolithography[News] Down And Dirty At IPC/SMTA-Sponsored High Performance Electronics Assembly Cleaning Symposium On Oct 28-29, 2008, IPC and SMTA will host cleaning symposium titled "High-Performance Electronics Assembly Cleaning." Keynotes will cover evolution of manufacturing residues and their effects on electronics assembly, as well as nozzle design and implementation for cleaning residues from high-density, low-profile assemblies. Event will also address cleaning standards and regulations, electronic ...
Printed circuit board manufacturing
Printed circuit boards (PCBs) are usually manufactured by specialized contractors.[Image]  Electronics manufacturing infrared thermal profiling
Surface-mount device components mounting
Surface-mount device (SMD) components can be hand-soldered, but usually they are placed using surface-mount technology (SMT). The process usually consists of 3 steps:
- solder paste print
- SMT placement, using a "pick and place" machine
- reflow oven
The process is repeated twice in order to populate both sides of the PCB.[Video] Seon Design Corporate Video
Through-hole components mounting
There are 3 methods for mounting through-hole components and connectors:
- hand soldering
- wave soldering
- selective soldering
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Depanel
In order to increase PCB and SMT capacity, several boards are panelized into one large multiblock. They are depaneled at a certain stage in the process, which might be before SMT, after SMT or just before final case-up.[Post] The Phillipines' 40 Richest 2008 Stock of family's conglomerate Ayala Corp. is down 46% since last year, in part because of economic slowdown and declining profits in banking and electronics manufacturing units. Family's shares all in children's hands. ...
Case-up
The case-up process consists of one or more of the following:
- conformal coat
- potting
- final case-up of the depaneled PCB in a housing using various methods: screwing etc.
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Cleaning
A completed PCA needs to be "cleaned", using various techniques depending on what type of solder and flux was used.[Site] Electronics Manufacturing Electronics Manufacturing. Industry Description and Practices ... The manufacture of passive com- ponents is not included because it is similar to ... ifc.org/ifcext/enviro.nsf/.../$FILE/electronmfg_PPAH.pdf
Drying
A clean wet board needs to be "dried" before the power can be inspected or electrically activate.[News] Avnet Electronics Marketing Receives Global Demand Creation Award from Freescale NYSE: AVT -Avnet Electronics Marketing, an operating group of Avnet, Inc. (NYSE: AVT), has received the Global Demand Creation Award from Freescale Semiconductor, Inc. The award recognizes Avnet as Freescale's largest and fastest growing demand creation distributor in all regions worldwide during calendar 2007.
Testing
Electronic assemblies are tested at various process steps using following methods:
- In-Circuit testing (in-circuit test) of integrated circuits and other components
- inspection of components and joint quality:
- * visual inspection
- * X-Ray inspection (usually of invisible joints, e.g. BGA)
- * Automated Optical Inspection Corporation]
- Final functional test after case-up
- various other tests for assembly functioning in a range of conditions (temperature, humidity, vibrations, strain, etc.)
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[News] Analog Devices Introduces Adaptive Lighting Management System for Improved Power Efficiency in Portable Electronics Displays found in portable electronics require a lot of battery power and with consumers favoring larger screens and higher quality screens for viewing image-rich content, the power efficiency of the display system becomes an increasingly important design consideration. The Analog Devices, Inc. (NYSE: ADI) ADP5520 lighting management system is a power-efficient, customizable display management ...
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[Post] Review of CTEA Vendor Show & Technical Program On Wednesday of this week I attended the annual Central Texas Electronics Association Vendor Show in Austin. The event took place at the new Norris Conference Center at Northcross Mall. This was my first visit to Norris, ... |