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Presentation Halle ICM - Internationales Congress Center München SEMICON EUROPA > Advanced Packaging Conference > Session 5: Advanced Packaging
12:20-12:45 Uhr | ICM - Internationales Congress Center München ICM Room 13b, 1st Floor
Themen: SEMICON EUROPA
Chairman: Thomas Oppert (, PacTech - Packaging Technologies GmbH)
Wafer bonding can be considered as one of the key enabling technologies for future 3D devices in the microelectronic/photonic system industry. However, complementary metal-oxide-semiconductor (CMOS) structures present on those devices require dedicated and compatible low temperature (LT) bonding schemes such as hybrid bonding. In LT bonding research hybrid bonding has lately become more and more the focus of attention, due to distinct advantages especially within semiconductor processing.In this paper SUSS MicroTec introduces a novel highly flexible approach for atmospheric plasma surface activation that allows for versatile full wafer treatments and high bonding energies. The absence of directed ions and electrical fields in general translate in full CMOS compatibility of the new plasma concept, making it especially suited for hybrid bonding. The described surface activation approach can be optionally integrated in automated bond cluster platforms from SUSS MicroTec via an innovative tool integration concept also presented in this paper. The integration concept comes along with distinct advantages over vacuum plasma, such as increased throughput, higher cleanliness, lower tool footprint, reduced wafer handling, lower cost of ownership etc. as demonstrated in the scope of this publication.The highly flexible chemistry that can be used within the new plasma activation approach also enables metal-oxide removal, i.e. reduction of copper oxide surfaces present at wafer-to-wafer (W2W) and collective die-to-wafer (D2W) hybrid bonding applications for 3D integration schemes. In this work surface free energy (including polar and dispersive components), defectivity, bond-strength, surface hydration and the dependence of surface pre-treatment have been studied. Water contact angles (WCA) down to