Johnstech International was founded in 1991 in response to market need. Having designed and patented several high-speed electrical contactors and automated test handlers for several American and Japanese companies, President and CEO of Johnstech International Corporation, David A. Johnson, saw where the semiconductor test market was headed and what was needed to get there.
“Semiconductor manufacturers were looking for much greater mechanical life in their test sockets,” he noted. “They were getting perhaps 10,000 tests from a contactor, but they were looking for ten times that. They also wanted to dramatically reduce re-screening, which was typically being done on 5-10 percent of integrated circuits, with a 30-40 percent recovery rate. From my experience, I could see that a new standard was needed for interconnected test solutions.” ![](https://www.johnstech.com/wp-content/uploads/2024/04/quality-policy-A4.jpg)
To meet this need, Johnson invented the patented Short Contact® technology used in Johnstech’s high-performance contactors. Johnstech’s specially plated, S-shaped short-rigid contact replaces the wider, higher, less rigid cantilever-style contacts used in traditional sockets. This reduces the electrical length between the load board and the device under test.
By shortening the effective electrical length and improving performance, Johnstech’s test solutions have helped manufacturers achieve far greater accuracy and improved reliability in test results. The increase in accuracy significantly increases bandwidth, thus helping to achieve higher production yields by allowing “guard bands” to be reduced.
Johnstech’s Short Contact solutions improve mechanical performance by averaging 100,000 insertions before any maintenance is required. With easily installed and maintained contacts and elastomers, contactor life for reliable performance can be extended upward to 1,000,000 insertions. These high-performance contactors are leading an industry-wide move away from traditional sockets, which must be maintained at about 10,000 insertions and completely replaced at 30,000 to 50,000 tests.
Johnstech offers test contactors and related services with the highest electrical and mechanical performance on the market. Our products ensure that global semiconductor manufacturers and test houses receive the most stable and reliable contactors, delivering the most accurate results for a wide range of applications.
Johnstech customers enjoy reduced development time, increased yields, and improved overall test floor and equipment efficiency. Johnstech is your contact for higher performance device testing, delivering the accuracy that characterization testing deserves and the reliability that production demands test after test.