FormFactor‘s patent involves probes with retroreflectors for probe systems, designed to efficiently transmit and receive light signals to and from devices under test. The retroreflector body includes specific features like tapered regions and light-receiving regions for optimal performance. GlobalData’s report on FormFactor gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on FormFactor, Under-screen biometric identification was a key innovation area identified from patents. FormFactor's grant share as of April 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.
Probes with retroreflectors for probe systems
A recently granted patent (Publication Number: US11927603B2) discloses a probe system comprising a probe with a retroreflector designed to receive and emit light at specific angles. The probe includes a retroreflector body with a tapered region and a light-receiving region on opposite sides, along with a probe tip for interacting with a device under test (DUT). The retroreflector is configured to reflect light internally and emit a fraction of it through the light-receiving region at an angle equal to the angle of incidence. Additionally, the probe features a background offset region to redirect incident light away from the retroreflector at a different angle.
The patent further details various configurations and features of the probe, such as the unitary or optically transparent nature of the retroreflector body, different communication methods with the DUT, and the shape and design of the light-receiving region. The probe system includes a chuck to support the substrate with the DUT, a light source to direct light towards the probe, and an imaging device to capture the emitted light. A method for utilizing the probe involves directing light towards the retroreflector, internally reflecting and emitting a fraction of the light, and scattering the remaining light away from the retroreflector. This innovative probe system aims to enhance testing procedures for devices under test by efficiently manipulating light angles for accurate signal transmission and reception.
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