Ask the Experts
July 30, 2007

Scribe lines for depaneling boards

Is there any standard or recommended specification used by board manufacturers for the depth of the scribe lines used to depanel boards? Appreciate your insight.

Brian Wall

Expert Panel Responses

The specifications tend to be based on the web thickness (board remaining) rather then the depth of the scribe lines. I good place to go is Vscore Central.

Dr. Craig D. Hillman
CEO & Managing Partner
DfR Solutions
Dr. Hillman's specialties include best practices in Design for Reliability, strategies for transitioning to Pb-free, supplier qualification, passive component technology and printed board failure mechanisms.

The document you are looking for is IPC-2222, Sectional Design Standard for Rigid Organic Printed Boards. Page 14 Fig 5-2 Provides all the information you will need to determine the Scoring parameters for depaneling the boards.

Leo Lambert
Vice President, Technical Director
EPTAC Corporation
At EPTAC Corporation, Mr. Lambert oversees content of course offerings, IPC Certification programs and provides customers with expert consultation in electronics manufacturing, including RoHS/WEEE and lead free issues. Leo is also the IPC General Chairman for the Assembly/Joining Process Committee.

A 30% score depth on each side should work. Pay attention to alignment of the two "V" cuts.

Prashant Joshi
Director of Engineering
Interconnect Systems Inc.
Prashant has 15 years experience in design and process development. With a MS in Mechanical/ Materials Engineering his areas of interest are connectors, electronics assembly, SMT, reballing, wire bond.
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