Hello Francesco,
a good standard who gives the procedure how to perform the pul. strength test of gull-wing leaded components is IEC 62137-1-1 Pull Strength Test
It tells the method how to perform the test, the suitable tools, and gives also the procedure how to asses the interfaced solder joint once pulled-off (land side, lead side, solder side, etc).
Unfortunately does not give any value of expected strength value.
I suppose to many variables are involved, terminal lead finishing, solder alloys, pcb land finishing, etc , that could influence the results, so not so easy to fix a value, or at lead a range of values....
Normally, the resulta are compared with known strength value data base (when available) collected by experience.
On the literature, we can find results obtained by several facilities during they studues, but in my reminiscence, as far as I remember I never met Standard indicating the strength target values to reach.
Let's see if any other Techetter has news on this matter.
Best Regard
Gabriele
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Francesco Di Maio
Inviato: mercoledì 18 settembre 2013 19.35
A: [log in to unmask]
Oggetto: [TN] Acceptance criteria for lead pull test
Hello Technet,
We have performed pull test for leads of QFP modules for a customer.
Now we were looking to find out which is the acceptance criteria for this
test in terms of the expected shear strenght for these leads.
Does anyone know where in which standards we can find these criteria.
Thanks in advance for your support.
Best regards
Francesco
Francesco Di Maio
IPC e Formazione
IPC A-600, IPC A-610, IPC 7711/21 Certified IPC Trainer
Via Kennedy Ingresso 2, 20871 Vimercate (MB) - Italy
Desk: +39.039.639.5921 - Mobile: +39.335.5693650 - Fax: +39.039.639.5051
E-Mail:[log in to unmask]
GEST Labs S.r.l. a Socio Unico
Societa’ soggetta a direzione e coordinamento da parte di SEM S.r.l. ai
sensi dell’Art. 2497 bis c.c.
Codice Fiscale, Partita IVA e Registro delle Imprese di Milano N
07602270964 – N. R.E.A. 1970226 - Capitale sociale € 500.000 interamente
versato
Sede Legale: Piazza Santa Maria Beltrade,.2 - 20123 Milano - Uffici
Amministrativi e Stabilimento di Vimercate Via Lecco, 61 20871 Vimercate
MB
Please visit us at: www.GESTLabs.it and www.SemTechnologies.it
<< Rispetta l'ambiente. Non stampare questa mail se non è necessario >>
------ CONFIDENTIALITY & PRIVACY NOTICE ------
This e-mail message and any file transmitted with it, contains
confidential or proprietary information.
If you are not the intended recipient of this e-mail, please be informed
that any use of the content hereof is prohibited.
You are requested to notify immediately the sender and delete the content
you received.
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|
