Depending on the type of Vertical Probe Cards Santa Clara you are working on, there are a few qualifications you should have before starting a job in
Depending on the type of Vertical Probe Cards Santa Clara you are working on, there are a few qualifications you should have before starting a job in the field. The article that follows provides some ideas about qualifications you should have as well as some of the types of probe cards you might encounter.
Cantilever-type probe cards
Historically, cantilever-type probe cards have been used for decades. However, the need for increased testing capabilities has caused manufacturers to develop more advanced technologies. Cantilever-type probe cards are a robust solution for a wide variety of applications. However, they are also more expensive than other types of probe cards.
Cantilever-type probe cards are difficult to align, making them difficult to use in high-speed testing applications. However, new probe tip materials allow manufacturers to reduce the contact force between the probe and the DUT. In addition, lithographically defined springs are now available that apply orders of magnitude less force than conventional probes.
Advances in technology are also allowing probe card manufacturers to increase the number of pins on their cards. This is important for applications where there is a high degree of parallelism. For instance, a chip-scale package is a type of device that can be tested in an area array environment. These devices are often sensitive and require reduced contact forces.
FormFactor high-parallel probe cards
Designed to handle the test requirements of advanced semiconductor devices, FormFactor’s Vertical Probe Cards Santa Clara eliminate probe card maintenance and downtime while lowering test times and costs. FormFactor’s new IQ2000 die probing system enables fabs to test their wafers at room temperature to 4K base temperature in under an hour. IQ2000 also provides comprehensive statistical data and enables expedited testing in ultra-low temperature environments.
Using Micro Spring contact technology, FormFactor’s probe cards are designed to meet high-speed testing requirements and eliminate probe card maintenance. FormFactor’s probe cards are currently in production at more than 20 wafer fabs worldwide.
FormFactor’s Micro Spring technology provides reliable contact on small die sizes. The contacts are permanently attached to a ceramic base, removing the need for repositioning and cleaning. This eliminates the risk of tip drift over time. This technology has been successfully implemented in several FormFactor probe card families.
In addition to the new Micro Spring contact technology, FormFactor’s vertical probe card family also incorporates a ceramic base to provide greater stability. This design enables parallelism across pad layouts.
Wafer-level chip-scale package (WLCSP) probe cards
Traditionally, the use of Vertical Probe Cards Santa Clara for testing wafer-level chip-scale packages (WLCSP) has been widely used. However, with the advent of larger, more complex packages, wafer testing becomes more complex. In addition, advanced packages have weaker interconnect structures. This makes it difficult to perform testing.
Fortunately, there are technologies that can be used to improve wafer testing. One of these technologies is the use of built-in self-test circuits. This technology may enable a cost-effective full wafer test.
Another type of vertical probing technology is the use of contact bumps on a flexible membrane core. Using lithographically defined contact bumps, the contact force is reduced to an order of magnitude compared to conventional probes. This technology is often referred to as the “cobra”-type probe.
The latest advancements in probe card technology, such as built-in self-test circuits, offer new opportunities to reduce test costs. These technologies offer higher test efficiency, lower operating costs, and more robust reliability.
Qualifications for a Vertical Probe Cards Santa Clara technician
Generally speaking, qualifications for a Vertical Probe Cards Santa Clara technician require a strong mechanical aptitude and knowledge of wafer testing, IC design and test equipment, and custom prober design. In addition, the technician must be familiar with PCB testing, BIST, and Agilent ATE.
A typical probe assembly consists of a thin metal blade (201), a specialized probe needle 202, and a matching interface 203. The blade is a very thin piece of metal bent downward at an angle toward the wafer’s surface. One end of the blade is attached to the probe needle, and the other end is attached to the matching circuitry.
The probe needle 202 is typically round in cross section, tapered from the midsection to the tip. It is attached to the blade 201 at a shoulder 204. This enables the probe needle to be adjusted, as it is attached to the blade in a very flexible fashion.
In order to adjust the probe needle, the technician pulls the probe needle along the tapered portion of the needle. Then, the technician replanarizes the probe needle at a planarization station.