ProductsProbe and Manual Actuator

Yokowo’s Standard Probes

Since every IC Package is unique, the corresponding socket must be custom made. While customers need sockets in a short time, it takes a certain amount of time to customize sockets individually.

We have been in the industry since 1979, and from this experience we have found similarities by application. With this knowledge in hand, we have prepared standard probes. Adopting standard probes not only shortens the design lead time, but also leads to the standardization of the assembly process, which in turn contributes to the shortening the production lead time.

1. Contact height and pitch

The pitch of our standard probes is from 0.3mm to 0.8mm.
There are some differences in the lineup by pitch. The table below is a lineup of 0.4mm pitch standard probes. Kelvin probe is also available . Please contact us for details.

Type Short Model Middle Model Long Model
Contact height 3.0mm 3.5mm 3.5mm
Stroke 0.4mm 0.4mm 0.55mm
Spring force 20gf 30gf 20gf 20gf 20gf 30gf
Tip shape ・BGA(4-point) ・BGA(4-point) ・BGA(4-point) ・BGA(4-point) ・BGA(4-point) ・BGA(4-point)
・QFN(4-point) ・QFN(4-point) ・QFN(4-point) ・QFN(4-point) ・QFN(4-point) ・QFN(4-point)
・LGA(Conical) ・LGA(Conical) ・LGA(Conical) ・LGA(Conical) ・LGA(Conical) ・LGA(Conical)
・QFP(6-point) ・QFP(6-point) ・QFP(6-point) ・QFP(6-point) ・QFP(6-point) ・QFP(6-point)

2. Structure

Our probes consist of 4 different components . Plunger A contacts the customer device side, while Plunger B contacts the PCB.
Different types of Plunger A shapes are available to suit each package type.

3. Plunger.A

We have prepared some representative shapes for different types of customer packages (custom shapes are also available).

Material: Pd Alloy
Shape: 4p-Crown
Material: Hard Au Plate
Shape: Conical
Material: Hard Au Plate
Shape: 6p(8p)-Crown
Material: Hard Au Plate

4. Unique internal structure

While Yokowo has served Semiconductor testing industry for more than 40 years, we have learned a lot from the market.
The knowledge we have gained through our experience is now fully integrated into the structure of standard probes, providing stable contact resistance and long service life.

Please contact us for details.

NOTE : Life of the probe (cycle count) strongly depends on customer's test condition.

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Types of Manual Actuators

Various types of lids are available according to customer requirements.
These are the lid types which Yokowo can supply.

  • Snap- on
  • Clam-shell
  • Nob
  • With Heat Sink

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