Development of a New Automatic Fault Diagnosis System for Fine Pattern Transmission Lines

다국어 초록 (Multilingual Abstract)

This paper presents a new automatic fault diagnosis and detection system for fine pattern interconnects.
It is verified by performance of the proposed system for COFs (chip-on-films) with width of less than 20 mm andpitch of less than 25 mm as fine pattern transmission lines. The proposed system detects and diagnoses variety offaults such as open, short, near open (mouse bite) and near short (soft short) after fabrication cycle of fine patterntransmission lines. This system consists of RF source, variable gain amplifier (VGA), multi-lead probe card, ACgenerator, Look-Up Table (LUT), signal processing block, and monitoring block. It also utilizes new techniquesto differentiate very small voltage changes due to the faults using VGA and programmable gain amplifier (PGA),and to detect barely detectable far-end near open and near short faults. The proposed system showed very low testoverhead and significantly high fault coverage as conventional test systems. It is expected that this system is aneffective alternative to decrease test overhead and increase fault coverage for the fine pattern transmission lines.

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