IPC-7527.pdf - 第21页
ANSI/IPC-T -50 T erms and Definitions for Interconnecting and Packaging Electronic Circuits Definition Submission/Approval Sheet The purpose of this form is to keep current with terms routinely used in the industry and the…
reduce these dangers and ensure a more consistent and pre-
dictable result. However, this is under the condition that the
cleaning process is monitored and maintained.
When using certain types of stencil cleaning systems, it
may be necessary to pre-clean the stencil. This step can be
conducted while the stencil is in the screen printer or
immediately before the stencil is placed in the cleaning
system. Normally it is possible to remove excessive solder
paste by using a squeegee or spatula.
When the material for wiping the stencil is to be chosen, it
is important that the material is designed for cleaning sten-
cils and will not release fibers, lint, or glue residues onto
the stencil. These pollutants can have a negative influence
on the subsequent screen printing process.
If the cleaning process requires a pre cleaning with chemi-
cals, a solvent should be chosen with the following proper-
ties:
• Nontoxic.
• Dries without leaving residues or odors.
• Dissolve solder paste.
• Complies with the solder paste manufacturer recommen-
dations.
The recommendations in the safety data sheet should
always be adhered to when cleaning!
A.9 Recommendations
A.9.1 Test Prints
A test print is as a visual check of the
print. A non-production board can be used to avoid
repeated cleaning of a production board.
According to the complexity and volume of the product,
the determination will need to be made as to the value of
test printing.
After printing of the test board, the operator can visually
verify alignment and deposit appearance. If all parameters
are met, production can begin.
IPC-7527 May 2012
14
SINGLE USER LICENSE - NOT FOR USE ON A NETWORK OR ONLINE
ANSI/IPC-T-50 Terms and Definitions for
Interconnecting and Packaging Electronic Circuits
Definition Submission/Approval Sheet
The purpose of this form is to keep
current with terms routinely used in
the industry and their definitions.
Individuals or companies are
invited to comment. Please
complete this form and return to:
IPC
3000 Lakeside Drive, Suite 309S
Bannockburn, IL 60015-1249
Fax: 847 615.7105
SUBMITTOR INFORMATION:
Name:
Company:
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Date:
❑ This is a NEW term and definition being submitted.
❑ This is an ADDITION to an existing term and definition(s).
❑ This is a CHANGE to an existing definition.
Term Definition
If space not adequate, use reverse side or attach additional sheet(s).
Artwork: ❑ Not Applicable ❑ Required ❑ To be supplied
❑ Included: Electronic File Name:
Document(s) to which this term applies:
Committees affected by this term:
Office Use
IPC Office Committee 2-30
Date Received:
Comments Collated:
Returned for Action:
Revision Inclusion:
Date of Initial Review:
Comment Resolution:
Committee Action: ❑ Accepted ❑ Rejected
❑ Accept Modify
IEC Classification
Classification Code • Serial Number
Terms and Definition Committee Final Approval Authorization:
Committee 2-30 has approved the above term for release in the next revision.
Name:
Committee: Date:
IPC 2-30
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SINGLE USER LICENSE - NOT FOR USE ON A NETWORK OR ONLINE