Traditional packaging

Classic single-die packages that protect and connect a chip.

What you’ll learn

What a traditional package provides
Common package styles
Their limits

Why it matters

Traditional packages still ship in enormous volumes and set the baseline.

Explanation

Traditional packaging places one die in a housing (e.g. QFP, BGA) with wire bonds or bumps to leads/balls, then encapsulates it. It protects the die, dissipates heat, and adapts the fine die pitch to the board.

As chips demanded more connections and bandwidth, these single-die packages began to limit performance — motivating advanced packaging.

Visual explanation

A single die in a package with leads/balls, sealed in moulding compound.

Key terminology

BGA: Ball-grid array package with solder balls underneath.
Lead frame: The metal frame forming a package's external leads.

Example

A microcontroller in a QFP package uses wire bonds from die pads to the leads.

Common mistakes

Watch out for:

Assuming packaging is 'just a box' — it constrains I/O count and thermals.

Real-world application

Cost-sensitive, lower-pin-count parts still use traditional packages widely.

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