LMK00105SQE leadframe finisch details

Jan Volkering

Expert 8190 points

HI,

One of my customers is asking what the precise leadframe finish is.

The product page quality & packaging tab gives only CU-SN.

Does this means a copper lead frame with tin finish?

Can you indicate what type of tin is used then?

over 9 years ago

0 Alan O over 9 years ago

TI__Mastermind 32575 points

Here’s where you can get the information:

http://www.ti.com/quality/docs/materialcontentsearch.tsp?PCID=202390&OPN=LMK00105SQE/NOPB#resultstable

You can get there by going to TI.com -> support & training -> choose packaging -> click material content search -> search and select your device.

Alan

0 Jan Volkering over 9 years ago in reply to Alan O

TI__Expert 8190 points

Alan,

The customer did that but there are no details what type of tin is used, plated, matte
Are there more details.
Otherwise we should take this off line so I can provide more details on the customer to understand why they are asking for this.

0 Jan Volkering over 9 years ago in reply to Jan Volkering

TI__Expert 8190 points

Alan,

Can you give more details on the type of tin that is used.

0 Alan O over 9 years ago in reply to Jan Volkering

TI__Mastermind 32575 points

Based on the material content search, the leadframe is Copper and Alloy, and the leadframe plating is Tin (CAS No. 7440-31-5).

I'm checking with our product engineering group if they have more info on the type of tin, but does the CAS No. help?

Alan

0 Martin Seeger over 9 years ago in reply to Alan O

TI__Expert 5411 points

Hello Alan,
thanks for your answer.

I am following up this topic on behalf of Jan.
If you have more details about the Tin, that would be great.

Thanks and best regards
Martin

0 Alan O over 9 years ago in reply to Martin Seeger

TI__Mastermind 32575 points

The only other info I could find out:

The lead frame is mostly Cu (~8mils=200um) with a Sn layer around 12um outside Cu.

What more is there to know/find out about Sn?

0 Alan O over 9 years ago in reply to Martin Seeger

TI__Mastermind 32575 points

The type of Tin is Matte Sn.

0 Martin Seeger over 9 years ago in reply to Alan O

TI__Expert 5411 points

Alan,
thanks a lot for the answers and digging deeper into this!
I think we have enough information for now.

Summarised:
* Lead frame: Copper and Alloy. Mostly Cu (~8mils=200um)
* Lead frame plating: Matte Sn (CAS No. 7440-31-5) as a ~12-um layer outside Cu

Best Regards
Martin

Edit: I cannot set the thread as "Solved" as I was not starting the discussion / please feel free to do so.

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LMK00105SQE leadframe finisch details