Adapter Probe

Posted in automotive tools by admin on December 15, 2008

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KENT MOORE J 35616 65A GM 64 FEMALE PROBE ADAPTER LIGHT BLUE
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Waekon 77203 Round Terminal Probe Adapter Set 31 Pc
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Ford Probe PCM Breakout Box T96P 12A650 C Adapter
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Waekon Industries 77203 Waekon Gold Perfect Mate ROUND Terminal Probe Adapter Se
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GM Brake Bleeder Adapter PPRBA04 BRAND NEW
GM Brake Bleeder Adapter PPRBA04 BRAND NEW
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Perfect Mate SPADE Terminal Probe Adapter Set WAE77202 BRAND NEW
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Adapter Probe
Adapter Probe

The Growing Need for Semiconductor High-Voltage Parametric Testing

How Did This Happen? The IC industry has been delivering on Gordon Moore's prediction of doubling transistor density every 18 months and has done so for nearly half a century. As computing power soared, the need to integrate more of the product functionality into a single chip has led to concepts like "More than Moore." Whereas Moore referred to transistor density scaling, "More than Moore" speaks to scaling the circuit board down to a single chip. Power devices that once lived on the circuit board are increasingly integrated into the IC itself.

One of the first areas to benefit from the "More than Moore" philosophy is power management. Power management comes in several flavors, including smart power management, green power management, and integrated power management. In every case, the combination of computational power, programmability, and high power driver circuits provide a platform to control and manage power and, consequently, to exercise control over the real world.

For example, consider Bipolar-CMOS-DMOS (BCD) technology. The term BCD is often used to describe a number of variants, including combinations such as CMOS-LDMOS, NMOS-LDMOS, etc. The general case can be described as a single-chip IC that includes CMOS logic, as well as bipolar and DMOS driver circuits that support high current, high voltage, and high power control.

Most of yesterday's BCD technologies were limited to less than 100V. Although providing impressive performance, these devices are easily characterized with existing parametric test systems. Today, a class of BCD technologies have emerged that use LDMOS to support voltages as high as 700V or 800V. These devices require special consideration when developing a parametric test strategy. It's expected that BCD technologies will exceed 1000V by about 2012. Such high-voltage devices are currently used for applications such has High Intensity Discharge (HID) illumination, where a combination of high voltage and high power is needed.

There are a variety of applications for high-voltage BCDs:

* Industrial controls (motor and actuator control)

* Automotive controls (lighting, engine control, drive train control, etc.)

* Advanced lighting (LED, HID, etc.)

* Power conversion and storage

* Display (backlight)

What Are the New Semiconductor Test Challenges? Comprehensive CMOS process control monitoring (PCM) using parametric test (sometimes called e-test) involves measuring a suite of 50 or more parameters. This test suite is performed on a special test element group or TEG. A TEG includes representative devices and structures, such as transistors, diodes, capacitors, resistors, etc. These TEGs are most often located in the kerf or alley between ICs and are destroyed when the wafer is diced prior to packaging. When a technology or process is immature, a high percentage of the TEGs are measured. A mature process may require measuring as few as 15 of the TEGs per wafer cassette.

The first challenge associated with testing BCD technologies is that each device type (bipolar, CMOS, and LDMOS) requires a unique suite of tests. This nearly triples the number of tests needed and significantly increases the complexity of the TEG. The second challenge is that the LDMOS device or the power device must be tested at high voltage and sometimes using high current. This includes breakdown and leakage tests for devices that can withstand hundreds of volts. These tests require voltage levels well beyond the range of standard parametric test systems. Finally, the LDMOS device may require testing at up to 1A or 10 times the capability of the standard parametric tester.

Breakdown tests are not just a simple matter of testing a two-terminal dielectric structure. The off-state channel-breakdown and leakage must also be characterized. To perform this test, the gate has to be in a controlled state. This requires the use of a source-measure unit (SMU) on both the gate and the drain, with the drain attached to a high-voltage SMU. As it turns out, the most likely failure mode during this test effectively shorts the drain to the gate. As a result, the SMU on the gate may be subjected to the full potential of the high-voltage SMU connected to the drain, in which case, it will likely be damaged.

The final challenge is monitoring the reliability of the process. This means that both dielectric and device reliability information must be captured as early as possible to ensure timely process adjustments. This is typically done with wafer level reliability (WLR) test techniques. The goal of these tests is not to predict absolute product lifetimes but rather to detect trends in failure mechanisms related to process control. More often than not, fast semiconductor tests like J-ramp and V-ramp breakdown tests are performed. These tests require voltages high enough to ensure failures, so they must exceed design targets by 20 percent or more. As a result, testing a 200V device is beyond the scope of a standard parametric test system.

High-Voltage Test System Considerations. Standard parametric test systems are typically designed to support single-ended signals up to 100V and differential signals up to 200V. Consequently, these systems use signal paths that support up to 300V to 500V to ensure long-term performance and reliability. But what about 1000V applications? What is the consequence of using an under-rated probe card and interconnect in a high-voltage application? Most often, the failure will be far from subtle and several instruments could be damaged in a single unfortunate incident. Certain probe card adapters (PCAs) and probe cards can support higher voltages if a pin wiring configuration that skips every other probe pin is used. This simple technique may double the effective voltage rating of the probe card and PCA. However, this technique cannot be universally applied to all probe cards and an engineering analysis is required to verify safe performance.

BCD and similar technologies require testing the CMOS logic at a few volts and few nano-amps while also supporting high-voltage tests at up to 1000V or so. There are several ways to support this requirement:

* The least attractive strategy is to use dedicated high-voltage testers and a standard parametric test system in a two-pass fashion. This two-pass strategy may also require using separate probe stations or physically reconfiguring the probe station between standard and high-voltage operations. However, there are further complications to this approach. After the two-pass process is complete, the resulting test data must be merged to build a complete picture of the test results.

* The second strategy is to use dedicated pins with directional connections to the high-voltage instruments. This limits flexibility and may force changes in TEG design or increase complexity by forcing additional prober moves, which would reduce throughput.

* The most attractive strategy to support this dynamic range is for the parametric test system to switch either standard or high-voltage SMUs to any pin, as allowed for example in Keithley's Series S530 High-voltage Parametric Test System. This is done using a switch matrix that includes both high voltage and general-purpose signal paths. This allows for greater speed and flexibility and a single-pass scenario that reduces system complexity and the opportunity for human error.

As with all production tools, the high-voltage parametric test system must be robust in terms of operator safety and system reliability. These goals are achieved with rigorous system engineering practices. System interlocks must prevent operators and instruments from being exposed to dangerous voltages. In addition, the system's low voltage instrumentation must be protected from damaging high voltages without compromising its low-level performance.

Test Plan Development. Given the special high-voltage system considerations described already, it's not surprising that high-voltage testing also has an impact on test plan development. Even the most sophisticated system design can't protect the test structure or the system from poor test programming. To take a simple example, it is well-known that hot switching a relay reduces the lifetimes of the relay contacts. (Hot switching refers to opening or closing contacts with a potential applied.) At low voltages, hot switching might reduce contact life from 108 to 105 cycles. In an automated environment, this is problematic enough. However, in a high-voltage regime, hot switching could reduce the relay contact lifetimes to 100 cycles—a single closure. Consequently, great care must be taken when creating a test plan to ensure the SMUs are sourcing zero volts prior to opening or closing any crosspoints in the switch matrix.

High-Voltage Parametric System Roadmap. The roadmap for BCD technologies and related processes over the next two to five years clearly indicates the need to move beyond 1000V in parametric test. This will pose a number of challenges for high-voltage parametric test systems. Instrumentation is likely the least significant of the challenges; however, probing at more than 1500V will almost certainly be much more challenging. High-voltage switch matrix technology will also need to evolve to maintain the high flexibility and speed that modern production parametric test systems must provide.

References. For further details on high-voltage parametric test techniques, view the archived online webinar at: http://event.on24.com/r.htm?e=301914&s=1&k=FF40A6E9C000E3179B0E526E85

About the Author

Paul Meyer is Senior Staff Technologist for Keithley Instruments' Semiconductor Measurements Group, based in Cleveland, Ohio. Prior to joining Keithley, Paul's career included designing semiconductor fab equipment, as well as engineering test systems and other equipment in semiconductor fabs.

Whats a low temperature adapter?

I just bought an Acu-Rite wireless weather station (model 00592w) that tells me the outdoor and indoor temperature and humidity levels. It came with a wire that plugs into the side of the outdoor wireless sensor and it says on the front of the manual that its a "low temperature adapter" and i don't exactly know what it does and if it's necessary to plug into the outdoor sensor. The wire is about 12 feet long and it has a probe at the end. If anyone can at least tell me what it does because the manual says NOTHING about it. Please help!

Some of these temperature sensors will stop working in very cold weather...or may even be damaged by extremely cold weather. Exactly how cold will depend on the instrument. If you are expecting very cold temperatures, you may want to take the remote sensor inside or into some type of shelter that will keep it warmer during the period of time and connect the wired sensor probe into the remote. Then put sensor probe outside so that it will continue to collect temperate readings during this period of very cold temperatures.

I would try to contact Acu-Rite and see what at what temperature would recommend that you should bring the remote inside and just use the wired sensor probe.

-- Update: ---

In response to the answer given by drsandradeepsb, I just checked the two links given by drsandradeepsb and this was what I found.

First link goes to a web site that explains the use of "a low temperature adapter that is used for Infrared Aiming Light atached to MOUNTING BRACKET of a M72 ROCKET LAUNCHER..

Second link goes to a question and answer web site where somebody posted a question about an Acu-Rite clock radio that included a low temperature sensor. As far as I can tell, nobody posted a reply answer to this question.

Ford Probe with SMT Intake Adapter and Apexi Filter