Component Testing

Component Testing

Quality testing during long term storage

In cooperation with our partner RoodMicrotec, we offer a competent solution to avoid the shortage, and guarantee the availability of components – a combination of controlled and secured storage including high quality testing services of your components.

While Totech takes care of the storage of your components, our partner is responsible for all accompanying quality services. These include physical & electrical tests as well as material analysis of your components.

We test ICs with the most common package types, such as SOIC, QFP, QFN or BGA. Please contact us to find out whether your component type is also suitable for long-term storage.

Incoming Goods Inspection

Delivered parts are first checked for preliminary damage or mechanical defect to avoid any unnecessary storage of defective components. The inspection procedure follows a standardized & proven process & includes the following steps:

  • External visual inspection
  • Solderability test
  • Wet chemical opening and exposure of the die of the components with the aid of laser ablation
  • Internal visual inspection for corrosion
  • Metallographic cross sections through the components terminals
  • Light optical microscopy
  • Scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX)
Incoming goods inspection

A corresponding incoming goods inspection report will be prepared for you based on the available results. The results of the incoming goods inspection determine the storage procedures. The presence or absence of a diffusion barrier layer in the structure of the connections for example, defines the interval of follow-up inspections during the storage period.

In addition, it might be necessary to perform a component-specific electrical input test if, for example, the origin of the components is unknown or the previous storage of the components has not taken place under controlled conditions. It is also better to sort out counterfeit components at an early stage before storing them for several years.

Possible in-house tests would be:

  • Contact test (test of ESD protection diodes)
  • Power-On-RESET conditions:
  • Current consumption
  • Input currents (Leakage, pull-up/pull-down currents)
  • Output voltage VOUT@IOUT and/or leakage currents on selected pins
Analysis of Components

Analysis during Storage

During the intermediate inspection, the components are again examined for solderability and intermetallic phase growth of the connection metallization. Depending on the result, however, this may also have acute effects on the further processability or storability of the components:

  • Re-tinning of the terminals
  • Immediate processing in PCB production, as further storage can no longer be recommended

Outgoing Goods Inspection

During the outgoing goods inspection, the components are subjected to the following tests:

  • Electrical test, if already available from the incoming goods inspection
  • Component scan, depending on package type incl. pin alignment (Scanning & Straightening) or coplanarity test
  • Dying & strapping
  • Sealing in ESD safe packaging
  • Shipping worldwide

If desired, a final examination of your components would also be possible at this point.

Long term storage - Outgoing goods inspection

One of the most reliable ways of protecting against obsolescence problems is to have your own stockpile, but that requires another area of expertise, component storage. And that is where Totech LTS² can help.

Jos Brehler, Totech Managing Director

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