Presentation 2004/1/29
Methods for Improving the Placement Ratio of E-beam Testing Pads for Multilevel-wiring LSI Circuits
Norio KUJI,
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Abstract(in English) Two novel placement methods for E-beam testing pads are proposed to improve the placement ratio in multilevel-wiring LSIs. In the first method, which is for the case where upper-level wires obstruct the placement of testing pads, stepped vias are introduced in testing pads so that testing pads can go around the upper-level wires outside the cells. This method has been applied to layout design data of gate-array LSIs containing from 20 to 390-k gates. Results of evaluation confirms that observability reaches more than 99.6%. In the second method, which is for the case where all the top-level wires are used for power supply, an opening is made in the power-supply wires so that a testing-pad to be placed may not short-circuit the wires. As a result of evaluation using actual design layout, resistive increase due to the openings in the wires was found to be so small that the method can practically be used for test pad placement. These proposed methods will be essential for fault analysis of multilevel-wiring LSIs.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Multilevel-wiring / E-beam tester / testing pads / stepped vias / observability / and planarization technology
Paper # CPM2003-166,ICD2003-205
Date of Issue

Conference Information
Committee CPM
Conference Date 2004/1/29(1days)
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Registration To Component Parts and Materials (CPM)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Methods for Improving the Placement Ratio of E-beam Testing Pads for Multilevel-wiring LSI Circuits
Sub Title (in English)
Keyword(1) Multilevel-wiring
Keyword(2) E-beam tester
Keyword(3) testing pads
Keyword(4) stepped vias
Keyword(5) observability
Keyword(6) and planarization technology
1st Author's Name Norio KUJI
1st Author's Affiliation Hachinohe National College of Technology()
Date 2004/1/29
Paper # CPM2003-166,ICD2003-205
Volume (vol) vol.103
Number (no) 645
Page pp.pp.-
#Pages 6
Date of Issue