Chunghwa Telecom has patented a probe card device with a unique transmission structure. The structure includes metal conductors inserted into a supporting layer, with an insulating resilient layer for absorbing external forces. This design allows for deformation providing a stroke distance, enhancing testing capabilities. GlobalData’s report on Chunghwa Telecom gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Chunghwa Telecom, AI for workflow management was a key innovation area identified from patents. Chunghwa Telecom's grant share as of April 2024 was 76%. Grant share is based on the ratio of number of grants to total number of patents.

Probe card device with metal conductors for testing devices

Source: United States Patent and Trademark Office (USPTO). Credit: Chunghwa Telecom Co Ltd

The granted patent (Publication Number: US11933817B2) discloses a transmission structure comprising a supporting layer with metal conductors integrally formed as elongated structures, spaced apart and slantingly inserted into the supporting layer. Each metal conductor includes a positioning segment, connecting segment, embedded segment, and exposed segment. An insulating resilient layer on the inner surface of the supporting layer embeds and fixes the embedded segment of each metal conductor, with the exposed segment protruding. The structure is designed to absorb external forces and provide a stroke distance when the exposed segment is pressed in a non-parallel testing direction. Additionally, the supporting layer includes a connection circuit where at least two metal conductors act as target conductors, electrically coupled through protruding portions abutting against the connection circuit.

Furthermore, the transmission structure in the patent includes two guiding boards stacked in a staggered arrangement to hold and arrange the metal conductors in the predetermined direction. The positioning segment of each metal conductor and the outer surface of the supporting layer have a specific slanting angle range. The target conductors can be grounding conductors or a pair of differential signal conductors, with the connection circuit including transmission lines and a capacitor. The protruding portions of the power and grounding conductors abut against the transmission lines for electrical coupling. This innovative transmission structure offers a unique design for efficient signal transmission and connection, with features to absorb external forces and provide reliable electrical coupling between target conductors and the connection circuit.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.