Patent ID: 11860192
Assignee: POINT ENGINEERING CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A probe head of a probe card, the probe head comprising:
an upper guide plate having an upper guide hole;
a lower guide plate having a lower guide hole; and
an intermediate guide plate having an intermediate guide hole and provided between the upper guide plate and the lower guide plate,
wherein each of a plurality of probes sequentially passes through the upper guide hole, the intermediate guide hole, and the lower guide hole by insertion of each of the plurality of probes,
wherein at least one of the upper guide plate, the lower guide plate, and the intermediate guide plate includes a first anodic oxide film, a film provided on the first anodic oxide film, and a second anodic oxide film disposed over the first anodic oxide film,
wherein the first anodic oxide film and the second anodic oxide film are bonded to each other by the film, and
wherein the first anodic oxide film includes a first barrier layer and first vertical pores, the second anodic oxide film includes a second barrier layer and second vertical pores, and the first and second barrier layers have a symmetrical structure.