What is 'E-spec'?
At CMK, we supply products that meet our in-house environmental standards (called 'E-spec') and are committed to reducing environmental impact through our product offerings.
The E-spec Standard Concept
E-spec standards consist of both mandatory and optional criteria. Products that meet these standards display the E-spec mark upon request.
|Chlorine Content||0.09 wt% or less|
|Bromine Content||0.09 wt% or less|
|Total Chlorine and Bromine Content||0.15 wt% or less|
|FR-1 Grade||0.15 wt% or less|
|CEM-3 Grade||0.15 wt% or less|
|FR-4 Grade||0.15 wt% or less|
By using substrates that meet the JPCA Halogen-free Standard, the halogen content is reduced to 1/60 (compared to conventional substrates).
|Name Grade||Peak temperature||Reflow temperature / time||Reflow cycles|
|CEM-3||250°C||230°C or higher / 50±5 seconds||2|
|FR-4||260°C||230°C or higher / 60±5 seconds||2|
|Thermal resistant preflux / water-soluble||○||○||◎||◎||○||3 months|
|Gold plating||○||◎||◎||○||△||6 months|
|Lead-free solder leveler
Comparative analysis based on internal data and market research.
*In Japan, CMK Group phased out resin-based heat-resistant flux in January 2008 based on our plan to reduce the use of volatile organic compounds (VOCs).