twist and camber 3

[caseymessick]

New at a job designing HDMI connectors. Still learning a bunch, appreciate it if anyone would care to explain a few terms on an engineering drawing I'm looking at:

Finish:
Ni UNDER PL
GOLD PL
TIN (MATTE)

[Matte is the question I have. Is it referring to it being the top layer of plating?]

Camber: 10 MAX/1000
Twist: 20° MAX/1000

FLEXED THE SIDE CUT FORM BY DIE DESIGN

It's a Japanese Engineering drawing

Thanks much

Casey

 

[itsmoked]

Nickel underplating on top of the actual material.
Gold plating over the nickle.


The tin is put on as a non-shiny rough layer good for soldering. I don't know what part you have there but rarely is tin put over gold. I suspect the tin is on the other end of the pins for soldering.

The tin matte is the replacement for the superior but non-RoHS tin-lead plating.


Camber is the maximum bent-angle seen in 1000 units.
Same idea with the twist.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[zappedagain]

Matte (finish) means the tin surface will be rough. If it was smooth it would be shiny. Shiny surfaces are typically harder to get an electrochemical bond (i.e. solder).