Rectangular or Square End Chip Components - 1,2,3 or 5 Side Termination(s) - End
Joint Width (C)
Acceptable - Class 3 - ️️End joint width (C) is minimum 75% of component
termination (W) or 75% land width (P), whichever is less
Staking Adhesive - Component Bonding
Acceptable - Class 1
Proc...
IPC-A-610 | Chapter 8
Rectangular or Square End Chip Components - 1,2,3 or 5 Side Termination(s) - End
Joint Width (C)
Acceptable - Class 3 - ✔️✔️End joint width (C) is minimum 75% of component
termination (W) or 75% land width (P), whichever is less
Staking Adhesive - Component Bonding
Acceptable - Class 1
Process Indicator - Class 2 - ✔️✔️Adhesive material extending from under the
component is visible in the termination area, but end joint width meets minimum
requirements
Staking Adhesive - Component Bonding
Defect - Class 3 - ✔️✔️Adhesive materials extending from under the component are
visible in the termination area
Staking Adhesive - Component Bonding
Acceptable - Class 1
Process Indicator - Class 2 - ✔️✔️Adhesive material extending from under the
component is visible in the termination area, but end joint width meets minimum
requirements
Staking Adhesive - Mechanical Strength
Acceptable - Class 1,2,3 - ✔️✔️- On round components adhesive adheres to a
minimum 25% of the component height
- On round components a minimum of three beads of staking material placed
approximately evenly around the periphery of the component
- Slight flow under the component body does not damage the components or affect
form, fit and function
Staking Adhesive - Mechanical Strength
Not Established - Class 1
Defect - Class 2,3 - ✔️✔️On round components there are less than three beads of
staking material
Staking Adhesive - Mechanical Strength
Defect - Class 1,2,3 - ✔️✔️Adhesive is not completely cured and homogemous
, QUESTION**: SMT Leads - Plastic Components - ✔️✔️Unless otherwise specified,
solder shall not touch a package body or seal. Expectations are when a copper lead or
termination configuration causes the solder fillet to contact a plastic component body,
such as:
- Plastic SOIC family (small outline packages such as SOT, SOD)
SMT Leads - Damage
Defect - Class 1,2,3 - ✔️✔️Lead is damaged or deformed more than 10% of the
diameter, width or thickness of the lead
SMT Leads - Flattening
Acceptable - Class 1,2
Defect - Class 3 - ✔️✔️The thickness of the flattened lead is less than 40% of the
original diameter
SMT Connections - ✔️✔️- Components with surface and/or termination ends or sides
that are not wettable by design are exempt from solder wetting requirements in those
areas. Solder fillet wetting to the sides or ends of the leads is not required unless
specifically stated.
- Solder fillet may extend through the top bend. Solder should not extend under the
body or surface mount components whose leads are made of Alloy 42 or similar metals.
SMT Connections
Acceptable - Class 1,2,3 - ✔️✔️Component titled/raised does not affect form, fit or
function
Chip Components - Bottom Only Terminations - Side Overhang (A)
Acceptable - Class 3 - ✔️✔️Side overhang (A) is less than or equal to 25% width of
component termination area (W) or 25% width of land (P), whichever is less
Chip Components - Bottom Only Terminations - End Joint Width (C)
Acceptable - Class 1,2 - ✔️✔️Minimum end joint width (C) is 50% width of component
termination (W) or 50% width of land (P), whichever is less
Chip Components - Bottom Only Terminations - End Joint Width (C)
Acceptable Class 3 - ✔️✔️Minimum end joint width (C) is 75% width of component
termination (W) or 75% width of land (P), whichever is less
Chip Components - Bottom Only Terminations - End Overlap (J)
Acceptable - Class 2 - ✔️✔️End overlap (J) between the component termination and
the land is minimum 50% the length of component termination (R)
Chip Components - Bottom Only Terminations - End Overlap
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PatrickKaylian. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
