Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 2000 1 Multi Multi - - Square Square Probe Card Probe Card (for Multi (for Multi - - DUT Testing of DUT Testing of Peripheral Pad Layout Devices) Peripheral Pad Layout Devices) Kouichi Eguchi, Micronics Japan Co., Ltd. Mark Godfrey, Everett Charles Technologies
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Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20001
MultiMulti--Square Square Probe CardProbe Card
(for Multi(for Multi--DUT Testing of DUT Testing of Peripheral Pad Layout Devices)Peripheral Pad Layout Devices)
Kouichi Eguchi, Micronics Japan Co., Ltd.Mark Godfrey, Everett Charles Technologies
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20002
Agenda
1. Background of Multi-Square Development
2. Market Demand for Multi-Die Testing
3. Multi-Square Overview
4. Structure
5. Probe Needle Specification Review
6. Results of Reliability Test
7. Summary
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20003
Background
■ Parallel test at wafer probe lowers test costs through reduced average test time per die.
■ This technique is used extensively for memory test due to long test times.
■ DRAM die pad patterns (i.e. LOC) and lead counts allow for highly parallel epoxy-cantilever probe cards.
■ Logic, mixed-signal, and SOC device pad patterns (peripheral) and lead counts present significant challenges for efficient multi-die probing.
■ The number of wafer touchdowns and ATE throughput is impacted by the die pattern of multi-DUT probe cards.
■ MJC has developed Multi-Square to provide high efficiency die probe patterns for parallel test of peripheral pad ICs.
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20004
Background
Typical 4 DUT probe card design
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20006
Diagonal Probe Angle Creates a Finer Needle Pitch Requirement
ab
For a 45o approach angle:
b = a/ 2
Example: die pitch (a) of 60 µm,
b = 42 µm.
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20007
Multi-Square 2x22x2 parallel DUT probing pattern
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20008
Multi-Square 2x2
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 20009
Multi-Square 2x2
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200010
Multi-Square In-line (1x2, 4, or 8)
Symmetric
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200011
Multi-Square 1x4
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200012
Multi-Square 1x8
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200013
Structure
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200014
1x4 Stiffener
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200015
Probe SpecificationComparison
Micronics Japan Co., Ltd / Everett Charles Technologies June 14, 200016
Multi-Square vs Diagonal Epoxy-Ring60µµµµm pitch 585pins SoC