Technical Articles

Supplier:

QA Technology Company, Inc.


QA Technology Company, Inc. has published these technical articles:

From this Article:
The adjustable installation tools are used to install sockets at any set height from flush to the maximum possible for a particular socket.... (View Full Article)
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This application note details instruction methods on how to remove alternate probes and sockets.... (View Full Article)
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Socket set height is a critical factor in the performance and life of a test probe. When set too low, the probe is under-stroked, reducing the contact force and the probe's ability to penetrate... (View Full Article)
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Probe Termination Pin set height is a critical factor in the performance and life of the X Probe. When set too low, the X Probe is under-stroked, reducing the contact force and the X Probe's ability... (View Full Article)
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High electrical resistance between the probe tip and the contact surface is the most common failure mode for probes.... (View Full Article)
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The graph compares the electrical performance of 100-25 Series probes with beryllium copper and steel plungers with gold plating. Eight probes from each of the two types were cycle tested together.... (View Full Article)
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This test report presents the data and describes the procedures for testing the current-carrying capacity for QA's test probes. This information is useful for test and design engineers when... (View Full Article)
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The decreased stroke (-D) option is designed for applications where a longer probe with a higher spring force is required.... (View Full Article)
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Double-Ended Sockets allow construction of fixtures with shorter signal path lengths compared to conventional wire-wrapped designs. The shorter path length allows for improved signal integrity from... (View Full Article)
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QA Technology highly recommends that holes initially drilled in fixture plates be verified using pin gauge tools (PG Tools) due to the tolerances of purchased drill bits which can be undersized by as... (View Full Article)
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Ever-increasing circuit performance challenges all aspects of test technology. Getting a clean and accurate signal from the tester electronics to the board under test is critical for high-speed... (View Full Article)
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In today's challenges of penetrating through Pb-free, OSP, No-Clean and other highly contaminated PCB targets, QA is pleased to offer our high pre-load spring probes. These high pre-load springs offer... (View Full Article)
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Reductions in the use of CFCs for board cleaning have led to increased use of no-clean fluxes. Properly tuned fluxing processes with modern low-solids fluxes result in boards that are readily... (View Full Article)
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The Indicator Probe is a special use probe, which shows the amount that standard probes are deflected in a test fixture. The indicator probe's plunger does not return to its original extended position... (View Full Article)
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The X Probe Terminations are installed in the Back plate of the fixture and are used to adjust the set height of the probe while providing the electrical connection from the probe to the fixture... (View Full Article)
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Installing .025-inch centers probes is a delicate process. Three areas require special attention:... (View Full Article)
From this Article:
Following these instructions will ensure that QA Technology sockets are installed in the correct manner for best accuracy, retention force and overall performance.... (View Full Article)
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QA Technology's .400 [10.16] series long-stroke 40 series probes are designed for use in dual-level (Functional/In-Circuit) test fixtures. The .400 [10.16] series long-stroke probes are easily mixed... (View Full Article)
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QA Technology's standard test probes are lubricated to increase their life. The lubricant drastically reduces the normal wear from the sliding metal-to-metal contact within the probe.... (View Full Article)
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OSP (Organic Solderability Protectant) coating is increasingly being used due to the advantages they offer the PCB manufacturing process.... (View Full Article)
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Detailed pointing accuracy studies concentrated mainly on close-center SMD probes. However, as larger probes are increasingly pressed into service for contacting small targets, their accuracy becomes... (View Full Article)
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Test probes used in production testing will eventually get dirty enough to cause contact problems. The following steps will eliminate contact problems caused by dirty probes:... (View Full Article)
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The objective of this application note is to compare Life Test performance of the 039mil "8R-S" Razor probe design, using a 039-PRP168RX-S probe installed into sockets mounted into a test block, both... (View Full Article)
From this Article:
This application note details the performance qualification study of the 100mil 8R-S Razor Tip.... (View Full Article)
From this Article:
QA Technology highly recommends that holes initially drilled in fixture plates be verified using pin gauge tools (PG-X39, PG-X50 and PG-X75A) due to the tolerances of purchased drill bits which can be... (View Full Article)
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Extraction Tools are used when a probe/socket assembly has been damaged and must be replaced. Removal of sockets on closely spaced grids is a delicate process. Care must be taken not to damage... (View Full Article)
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To measure the forces involved when installing and removing sockets from different materials. This information is useful for determining press capacities for socket installation and if its retention... (View Full Article)
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This test measures the electrical resistance on the portion of the socket, which is in the primary current path. The resistance is measured as shown in the sketch. Note that secondary parallel paths... (View Full Article)
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Solder connections are normally made on solder cup sockets. But in some cases it is desirable to make solder connections on the tailpin (round or square) of QA's soldered sockets. This can be done... (View Full Article)
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QA Technology's long-stroke interface probe, part number 100-PRG2441S, was designed to be used as a replacement probe for Teradyne's Test Station "LH" and "LX" test systems. This application notes... (View Full Article)
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New regulations will require the use of Pb-Free solder for many assemblies by July 1, 2006. This issue has prompted QA Technology to research the impact this will have on the selection of ICT probes.... (View Full Article)
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When selecting probe spring force for vacuum fixtures, consider these factors: 1) Total probe spring force 2) Condition of contact surfaces 3) Distribution of probes across the probe field... (View Full Article)
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QA Technology's UNSET Socket/Termination installation tools (IT{series}-UNSET and IT-X{series}-UNSET) is a partially assembled Installation Tool for Conventional sockets and X Probe Terminations. All... (View Full Article)
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An air-actuated crimper (CR2830) is available for permanently attaching customer-supplied wire to Wire Jacks. The crimper is a precision tool that requires no maintenance other than occasional... (View Full Article)
From this Article:
Wire Plugs are used to connect 28 or 30 AWG solid conductor, Kynar insulated wire to all QA Technology .050 inch centers termination sockets. Sockets are also available with pre-attached wire and... (View Full Article)
From this Article:
The 050-SRB255W, 050-STB255W and X50-TW-3G/5G sockets are specifically designed for wire wrapping on .050 [1.27mm] centers. The .250 [6.35mm] long .016 [0.41mm] square post (050-SRB and STB255W) and... (View Full Article)
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QA Technology test probes can be used over a wide range of temperatures without affecting their performance. The following discusses some items to consider when using QA test probes at the limits of... (View Full Article)
From this Article:
This test report presents the data and describes the procedures for testing the current-carrying capacity for QAs X Series test Probes and Terminations. This information is useful for test and design... (View Full Article)
From this Article:
When drilling X Probe fixtures, the size and straightness of the hole is very important. The holes must be straight, without a taper and must be aligned to each other when the plates are stacked... (View Full Article)
From this Article:
As with any new technology, proper use of the product is essential to its success. QA is here to help you through these challenges. The following are some tips and troubleshooting suggestions.... (View Full Article)