Technical Insight
How EMC Filler Loading Controls Thermal Conductivity, Flow, Cure, CTE, Modulus, and Insulation
Panduan rekayasa ini membahas How EMC Filler Loading Controls Thermal Conductivity, Flow, Cure, CTE, Modulus, and Insulation, termasuk batas proses, bukti validasi, dan kebutuhan kualifikasinya.
Author: Aurexene Materials Engineering Team · Last updated: 2026-07-26
Jawaban singkat
In this page, EMC means epoxy molding compound. Pilih kadar pengisi melalui satu matriks formulasi sepadan yang mengukur respons termal, aliran transfer, pematangan, CTE, modulus, isolasi listrik, rongga, daya rekat, dan pelengkungan paket. Label kandidat di bawah menggunakan Nitrida Boron Heksagonal (hBN) dan hBN × AlN (hBNxAlN). Peningkatan termal ruah bukanlah kualifikasi paket.
Masalah
Advanced semiconductor packages ask a molding compound to protect fine structures, fill complex geometry, resist moisture, manage stress, preserve insulation, and move heat. Increasing a thermally conductive filler can help one requirement while making flow, cure, and package stress worse.
Mekanisme
Heat moves through particle contacts and across filler-matrix interfaces. Loading, particle-size distribution, shape, orientation, surface treatment, and resin-rich gaps therefore affect the network. The same variables change viscosity, transfer pressure, cure, CTE, modulus, local stress, and the probability of incomplete fill or voids.
Kompromi
| Decision variable | Potential benefit | Coupled risk | Required check |
|---|---|---|---|
| Higher filler fraction | More possible heat-flow contacts and lower resin fraction | Higher viscosity, restricted flow, voids, wire or feature disturbance | Matched flow, pressure, fill, void, and thermal tests |
| Broader particle-size distribution | Denser packing may be possible | Segregation, surface-area, wetting, and lot-sensitivity changes | Particle distribution, mixing, rheology, cross-section, and lot study |
| Hybrid hBN/AlN route | Alternative insulating contact network | Different interface chemistry, orientation, cost, and process window | Matched single-filler control plus dielectric and aging tests |
The table should be read across each row: a potential thermal advantage is conditional on the process and reliability gate in the same row, not evidence of a universal loading optimum.
Strategi material
Start from the qualified production compound. Add hBN or hBNxAlN only as controlled formulation variables. Compare mass fraction and volume fraction, retain the same resin and cure basis, and do not use supplier powder conductivity as a substitute for compound or package data.
Arsitektur yang disarankan
- Baseline-first series: hold resin, catalyst, cure, specimen geometry, and total filler volume constant while changing one filler variable.
- Hybrid packing series: vary ceramic identities and size distributions only after the baseline mixing and transfer window is repeatable.
- Package confirmation: mold the target geometry and preserve locations for void, warpage, delamination, insulation, and thermal-path inspection.
Pengukuran dan validasi
Record formulation identity, filler volume and mass fraction, particle distribution, morphology, surface treatment, moisture conditioning, mixing torque, transfer profile, cure, specimen direction, and temperature. Pair thermal diffusivity or conductivity with rheology or spiral flow, cure response, CTE, modulus, insulation resistance, void inspection, adhesion, warpage, and thermal cycling.
Batas kualifikasi
The cited evidence supports a coupled screening framework. It does not approve a Aurexene Materials grade, loading, resin, molding process, package architecture, or numeric limit. Release requires reviewed formulation evidence, repeat lots, final-package testing, and change control.
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Perbandingan terkait
hBN vs AlN is an insulating-filler screening baseline; it does not replace a matched molding-compound formulation study.
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Source Basis
Perlu menerapkan batas ini pada mutu, formulasi, metode uji, atau jalur produksi? Bahas bersama Tim Rekayasa Aurexene Materials.