Molding (encapsulation) equipment
The encapsulation tools that seal the die and its connections in a protective molding compound, forming the body of the package.
In short
Molding equipment encapsulates the die and its interconnections in a protective compound — usually an epoxy — creating the solid package body that shields the chip from moisture, contamination, and mechanical damage.
Why it matters
Bare dies and fine bonds are fragile. Encapsulation protects them and gives the package its mechanical form and handling robustness; it also affects heat flow and reliability.
Beginner intuition
After the die is connected, it needs to be sealed inside a tough body — molding surrounds it with a protective compound that hardens into the package you can see and handle.
Think of setting a delicate part in solid resin so it survives the outside world.
Where it fits in manufacturing
In the encapsulation step, after interconnection and before singulation, for molded package types.
How it works
What goes in
- Interconnected dies on substrates or leadframes
- Molding compound (typically an epoxy resin)
What happens inside
- Load: assembled units are placed in a mold.
- Fill: molding compound is introduced under heat and pressure to surround the die and connections.
- Cure: the compound hardens, then units are removed and post-cured.
What comes out
- Encapsulated packages with the die sealed inside a protective body.
Major subsystems
Mold & press
Shapes the package and applies heat and pressure.
Compound feed
Delivers and meters the molding compound.
Cure system
Hardens the compound.
Process parameters that matter
- Fill completeness
- Full encapsulation with no unfilled areas.
- Void content
- Trapped voids that weaken protection and heat flow.
- Warpage
- Package bowing from cure stress — worse for thin or large packages.
- Cure conditions
- Time and temperature that set final properties.
A note on numbers
Common issues
What can go wrong:
- Incomplete fill → exposed, unprotected areas
- Voids → weak spots and heat traps
- Warpage → assembly and board-level problems
- Wire sweep during fill → shorts
Yield implications
Molding defects can ruin otherwise-good assemblies late in the flow; fill quality and warpage control are key.
Advanced & research
Emerging and research directions, beyond today’s established practice.
- Low-warpage compounds for thin and large packages
- Molded wafer-level and fan-out encapsulation
- Compounds tuned for heat and reliability
How this connects
Related process
Related concepts
Related materials
Related equipment
Packaging connection
Encapsulation forms the package body that protects the die and gives the part its handleable form.
Packaging →Supply-chain connection
Molding depends on epoxy molding compounds from the packaging-materials supply chain.
Supply chain →