embedded

**Embedded Die Substrate** is **directly embedding semiconductor dies within substrate material creating integrated multi-chip modules** — maximizes density. **Die Placement** cavity within substrate; die glued in place. **Interconnection** bondwires or flip-chip bumps from die pads to substrate traces. **Trace Routing** multiple metal layers route signals around embedded dies. **Vias** connect metal layers; thermal vias dissipate heat. **Encapsulation** potting or overmolding protects. **Thermal** die coupled to substrate; heat dissipates efficiently. **Multi-Chip** multiple dies embedded simultaneously or sequentially. **Sequential** embed tier, add layer, embed next (3D-like). **Cost** embedding adds steps but justified for high-density. **Yield** defective embedded die: entire substrate often scrapped. **Manufacturing** precise cavity depth, placement alignment, encapsulation. **Interconnect** shorter than separate components. **CTE Stress** mismatch between materials (substrate, epoxy, silicon) creates stress. **Reliability** thermal cycling tests validate design. **Design** layout complex; critical traces avoid die. **Warpage** large substrate warping affects yield. **Applications** high-density modules, automotive, medical. **Embedded die substrates achieve extreme density** via monolithic integration.