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MC 8: EHD Multinozzle Printheads as Enablers for Economic microLED Color Conversion

MC 8: EHD Multinozzle Printheads as Enablers for Economic microLED Color Conversion
Patrick Galliker

Co-founder and CEO

Scrona

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MC 8: EHD Multinozzle Printheads as Enablers for Economic microLED Color Conversion

Inkjet printing of has become a manufacturing standard for obtaining high-end QD-enhanced OLED displays. To extend the viability of this approach towards microLED manufacturing, the conventional inkjet process is too limiting though in terms of droplet size and precision. Also, the low viscosity of inks is a major concern, since layer thickness of printed QD layers needs to be minimized, in order to reduce light-losses at the black matrix. All these problems can be coped with by using EHD printing instead of conventional piezo-based ejection, as the process not only delivery sub-micron resolution but is also compatible with much higher ink viscosities. So far, the limitation, like so often, is not quality but quantity though. Scrona offers multinozzle based EHD printheads that combine the benefits of the EHD process with MEMS-based throughput-scaling that conceptually mimics that of conventional piezo-based inkjet heads, thereby finally paving the way for the technology to mature into production environments.

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