Evaluation of a Spring Probe Card Solution for 5G WLCSP Applications

Dąbrowiecki, K.; Gneiting, Thomas; Moreira, Jose

doi:10.23919/iwlpc.2019.8913842

Cited by 4 publications

(4 citation statements)

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“…In an unconventional setup, two traditional pico-probes are used to directly contact a signal-ground Pogo-pin pair on each end to measure 3 dB of loss at 20 GHz [8]. In the latest Pogo-pin research, the performance of three Pogo-pins providing G-S-G connections for CPW transmission lines on two PCB's positioned at 90degree angle [9], and an extensive theoretical analysis using HFSS on a Pogo-pin array for insertion loss and crosstalk coupling in the millimeter-wave range [10] are discussed. In this paper, we present a fully assembled RF probe card that uses an array of 157 Pogo-pins packaged in a low-loss ceramic with the pitch size fixed by the millimeter-wave circuit under testing.…”

Section: Introductionmentioning

confidence: 99%

RF Pogo-Pin Probe Card Design Aimed at Automated Millimeter-Wave Multi-Port Integrated-Circuit Testing

Lee

Kim

et al. 2021

Electronics

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A prototype RF probe card is assembled to test the feasibility of Pogo-pins as robust probe tips for the automized testing of multiple-port millimeter-wave circuits. A custom-made ceramic housing machined from a low-loss dielectric holds an array of 157 Pogo-pins, each with 2.9 mm-length in fixed positions. The ceramic housing is then mounted onto a probe-card PCB for power-loss measurements on two signal-ground Pogo-pin connections arbitrarily selected from the array. The probing results on a test circuit with a simple thru-line indicate a successful power transfer with a small insertion loss of less than 0.5 dB per single Pogo-pin connection up to 25 GHz. A new probe card design using shorter Pogo-pins is being prepared to extend the operation frequency to beyond 40 GHz.

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Section: Introductionmentioning

confidence: 99%

RF Pogo-Pin Probe Card Design Aimed at Automated Millimeter-Wave Multi-Port Integrated-Circuit Testing

Lee

Kim

et al. 2021

Electronics

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“…Recent research is exploring pogo-pin sockets designed for use in millimeter-wave bands within SoC environments. One study indicated the potential for resonance occurring at 30 GHz due to the height of the dielectric socket, as demonstrated through simulations with a pogo-pin array [ 18 ]. This study highlighted challenges with pogo-pin arrays and dielectric sockets in the analysis of transmission and coupling performance.…”

Section: Introductionmentioning

confidence: 99%

50 GHz Four-Port Coupling-Reduced Probe Card Utilizing Pogo Pins Housed in Custom Metallic Socket

Lee,

Kim,

Ahn

et al. 2024

Sensors

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A design for a pogo-pin probe card featuring a metallic socket is proposed to eliminate signal leakage and coupling loss in a multi-port environment. The proposed metallic pogo-pin socket includes a metal wall structure between adjacent pogo pins, ensuring complete isolation. This metal wall offers an advantage in removing coupling issues between pogo pins that can occur with typical dielectric pogo-pin sockets. The designed probe card is fabricated as a prototype and verified for its performance. Measurement results using a test through line show that coupled power is minimized, providing a low-loss transmission performance of −2.14 dB to an RF chip at 50 GHz, all within a compact size. Although the dielectric spacer used to secure the pogo pins allows for some leakage, it can maintain a low coupling performance of under −15 dB in the millimeter-wave band. The prototype probe card can deliver an RF signal to a 5G circuit with a low loss of −0.7 dB at 28 GHz and −1.9 dB at 39 GHz frequency. The designed probe card is capable of transmitting multiple RF signals to the RF system without signal distortion in a multi-port environment.

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“…In recent pogo pin research, pogo pins up to 30 GHz, including the 5G band, have been analyzed. In particular, research has analyzed the transmission and coupling performance of pogo pin arrays up to 30 GHz using only High-Frequency Structure Simulator (HFSS) simulation [ 21 ]. Another study developed a prototype pogo pin probe that can operate with an insertion loss of 20 dB up to 30 GHz [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Loss Pogo Pin Probe Card with a Coupling Isolation Structure up to 50 GHz

Lee

Ahn

Park

et al. 2023

Sensors

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A design for a millimeter wave RF probe card that removes resonance is proposed. The designed probe card optimizes the position of the ground surface and the signal pogo pins to resolve the resonance and signal loss issues that occur when connecting a dielectric socket and a PCB. At millimeter wave frequencies, the height of the dielectric socket and pogo pin matches the length of half a wavelength, allowing the socket to act as a resonator. When the leakage signal from the PCB line is coupled to the 2.9 mm high socket with pogo pins, resonance at a frequency of 28 GHz is generated. The probe card uses the ground plane as a shielding structure to minimize this resonance and radiation loss. The importance of the signal pin location is verified via measurements in order to address the discontinuity caused by field polarity switching. A probe card fabricated using the proposed technique exhibits an insertion loss performance of −8 dB up to 50 GHz and eliminates resonance. A signal with an insertion loss of −3.1 dB can be transmitted to a system-on-chip in a practical chip test.

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Evaluation of a Spring Probe Card Solution for 5G WLCSP Applications

Cited by 4 publications

References 0 publications

RF Pogo-Pin Probe Card Design Aimed at Automated Millimeter-Wave Multi-Port Integrated-Circuit Testing

RF Pogo-Pin Probe Card Design Aimed at Automated Millimeter-Wave Multi-Port Integrated-Circuit Testing

50 GHz Four-Port Coupling-Reduced Probe Card Utilizing Pogo Pins Housed in Custom Metallic Socket

Low-Loss Pogo Pin Probe Card with a Coupling Isolation Structure up to 50 GHz

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