Multilayer varistors (MLVs)
Automotive series
Good and poor solder joints caused by amount of solder in reflow soldering.
5
Conductive adhesion
Attaching surface-mounted devices (SMDs) with electrically conductive adhesives is a commer-
cially attractive method of component connection to supplement or even replace conventional sol-
dering methods.
Electrically conductive adhesives consist of a non-conductive plastic (epoxy resin, polyimide or
silicon) in which electrically conductive metal particles (gold, silver, palladium, nickel, etc) are em-
bedded. Electrical conduction is effected by contact between the metal particles.
Adhesion is particularly suitable for meeting the demands of hybrid technology. The adhesives
can be deposited ready for production requirements by screen printing, stamping or by dis-
pensers. As shown in the following table, conductive adhesion involves two work operations fewer
than soldering.
Reflow soldering
Screen-print solder paste
Mount SMD
Wave soldering
Apply glue dot
Mount SMD
Cure glue
Conductive adhesion
Screen-print conductive adhesive
Mount SMD
Predry solder paste
Reflow soldering
Wash
Cure adhesive
Wave soldering
Wash
Inspect
Inspect
Inspect
Please read Cautions and warnings and
Important notes at the end of this document.
Page 62 of 72
EPCOS [ EPCOS ]
