IPC-SM-840E: Qualification and Performance Specification of Permanent Solder Mask and Flexible Cover Materials
Establishes the requirements for the evaluation of liquid and dry film solder mask material and for the determination of the acceptability of use on a standard printed board system. IPC-SM-840 provides two classes of requirements, T and H, to reﬂect functional performance requirements and testing severity based on industry/end use requirements. Coverage is given to adhesion, material qualification, resistances to solvents, and electrical requirements. Revision E incorporates requirements for flexible cover materials used as a flexible dielectric protective layer over etched conductors and other conductive features.19 pages. Released December 2010.
Multiple-Device License (MDL), Digital Rights Management (DRM) - Protected Document. The MDL DRM product can be purchased starting with a 12 device license and any quantity larger than that. NOTE: The pricing shown is for 1 device. Upon check out the price will be updated for the total devices purchased. A 10% discount is applied to any quantity of 20 and more when purchased on the same order. Users of this MDL document will only be able to open it on the number of devices specific to the product order. (Example: If you placed an order for a MDL of 12 then you would be able to open the document on 12 devices) For information about IPC standards with DRM protection, visit www.ipc.org/mdl
Release Date: 8/4/2020
Product ID: SM840-STD-0-MDL-0-EN-E