Testing and Quality Assurance

//Testing and Quality Assurance

PCB Assembly Testing and Inspection
Testing is crucial to ensure high quality products are delivered to customers. Thankfully board assemblers offer multiple layers of testing and inspection to ensure high-quality, assembled Circuit boards are produced and delivered to customers. Despite all efforts to prevent errors, printed circuit board assembly is a complex process and defects sometimes occur relating to a variety of issues from incorrect component loading to failures in SMT equipment. Thorough testing and inspection occurs throughout the production process to ensure problems are captured early on, ensuring high quality and yield.

Visual Inspection of Solder Paste
Visual inspection is a vital element in ensuring problems are captured and corrected as early in the process as possible, reducing the time and cost associated with rework and wastage. Visual inspection begins with the solder application. Inspection at this stage checks for correct deposition of solder paste on pads to ensure components reflow properly. Here testing helps prevent solder bridges, open circuits or fragile joints prone to failure.

Pre and Post Reflow Inspection
Pre and post reflow inspection are important elements in quality control. Pre-reflow inspection catches placement errors at a point where they are easy to repair, avoiding repetitive mistakes early in the process. This is important with products like automotive boards where regulatory compliance require that boards cannot be reworked. Components and boards are heat sensitive and detection of errors at this stage can avoid their damage or destruction. Post-reflow inspection can be manual or with AOI.
A ‘first article’ inspection is performed on a run to ensure all SMT feeders are set up correctly and that there are no issues like worn vacuum nozzles or alignment of the vision system. Board assemblers can offer a special ‘First Article Service’ that enables a rapid and cost effective pre-production process by expediting a production of a few boards to designers for testing prior to a full run.

Post reflow BGA inspection and testing, along with other leadless parts require special considerations as the component package shadows solder joints making inspection impractical without special equipment. Inspection can be conducted by a range of devices including: computed-tomography (CT) scanning, specially angled optics microscopes, endoscopes and X-ray machines.

Flying Probe Testing
Flying probe testing is good for where a PCB test jig is prohibitively expensive. Flying probe has relatively low setup cost and a test procedure can be designed and implemented in a single day. Assembled PCBs with all components placed are compared electrically against the measurements from a golden board for verification. It can conduct open, short, orientation and component value circuit checks. This can help verify correct component placement and alignment.

For PCB assembly, in order to ensure high quality, we do and provide related testing and inspection, include:

IQC: Incoming Materials Inspection
First Article Inspection for every process
IPQC: In Process Quality Control
QC: 100% Test & Inspection
QA: QA based on sample inspection plan
Workmanship: IPC-A-610
Quality Management based on ISO9001:2008, ISO13485:2003, ISO/TS16949:2016 and ISO14001:2004
Automatic Optical Inspection (AOI)
Hi-pot test
In-circuit Test (ICT)
Vibration test
Functional test (FCT)
Burn in test
Reliability test
Thermal cycle test

PCBA assembly Appearance Inspection Instructions

Printed circuit board assembly (PCB assembly, PCBA), often use abbreviations—— PCBA, is an important electronic parts, is the support of electronic components,the provider of the electronic circuit connection.Because it is produced by using electronic printing technology, it is called "printed" circuit board.Before appears in the printed circuit board, electronic components of interconnection between relied on wires connected directly and form a complete circuit. Now, the circuit bread board only to exist as an effective experiment tool,but the printed circuit board in the electronics industry has become the dominant position. But most people still don't know what is PCBA  appearance inspection [...]

Electronic testing, function test after PCB assembly

Electronic testing, function test after PCB assembly PCBA Testing Inspection China, Functional Testing, AOI, ICT, X-Ray, Burn in Testing Usually it is about the evidence that the promised technical product characteristics are meet. In addition to the required electrical safety tests relevant function tests are necessary. In our case the function test is carried out after the successful safety test during the final test after the product has been manufactured. Usually, we suggest customers make electronic testing, PCBA function test after PCB assembly. For the combination of safety and function test offers SPS electronic multi function tester including both tests. [...]

How much do you know PCB Assembly First Article inspection?

First Articles Inspections (FAI) are generally less common than other inspection types, like visual inspection, AOI, X-ray and SPI in the mind of people who are involved in Printed Circuit Board (PCB) Assembly Manufacturing industry. And many of PCB assembly or SMT assembly suppliers who are unaware of the customer’ requirements might resist outside inspection.   It’s even more important to outline your PCB assembly requirement for a first article inspection in your fabrication drawing documentation, and check with the circuit board assembly manufacturer whether it has capability to conduct the FAI work and meet your requirement. If the requirement [...]

PCBA testing service

Hitechpcb owned experienced professional and technical technology team. We can provide ICT service for customers. In circuit testing (ICT) is traditionally used on mature products, It uses a bed-of-nails test fixture to access multiple test points on the PCB’s bottom side. With sufficient access points, ICT can transmit test signals into and out of PCBs at high speed to perform evaluation of components and circuits. A bed of nails tester is a traditional electronic test fixture. It has numerous pins inserted into holes, which are aligned using tooling pins to make。 contact with test points on a printed circuit board [...]

2020-02-22T18:57:04+00:00Categories: Testing and Quality Assurance|Tags: |