Printable Diode Ink Suspension for Low-Cost LED Manufacturing
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Solution Overview
Problem
Current methods for manufacturing light emitting diodes (LEDs) and photovoltaic devices are costly and labor-intensive, involving complex processes that make them unsuitable for widespread consumer use, as they require semiconductor wafers and intricate assembly processes.
Innovation Solution
A liquid or gel suspension of fully formed, functioning diodes or two-terminal integrated circuits is developed, allowing for printing-based manufacturing using a diode ink composed of diodes, solvents, and viscosity modifiers, enabling the creation of LED-based devices and photovoltaic panels with reduced costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional semiconductor wafer processes are used to manufacture LEDs and photovoltaic devices, then manufacturing precision and device reliability are improved, but manufacturing cost and process complexity increase significantly
Solution Approach 1:
The patent uses printed circuit board (PCB) technology to create simplified copies of semiconductor devices. Instead of manufacturing complete semiconductor wafers with complex photolithography and etching processes, the invention creates functional equivalents using printed conductive traces, solder pads, and surface-mounted components on PCBs, thereby reducing process complexity while maintaining device functionality and reliability
Solution Approach 2:
The patent segments the semiconductor device manufacturing process into separate functional modules that can be independently fabricated and then assembled on PCBs. Individual components such as light-emitting elements, photovoltaic cells, and electronic circuitry are manufactured separately using simplified processes and then integrated through standard PCB assembly techniques, reducing overall process complexity
2Reliability
If traditional semiconductor wafer processes are used to manufacture LEDs and photovoltaic devices, then device performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent creates functional copies of expensive semiconductor devices using inexpensive PCB materials and standard electronic components. By replicating the electrical and optical functionality using printed circuits and surface-mounted devices rather than complete semiconductor wafers, the invention achieves comparable performance at significantly lower manufacturing costs
Solution Approach 2:
The patent employs disposable PCB substrates and standard electronic components that can be manufactured at low cost using high-volume printing and assembly processes. These components are designed for ease of manufacture and replacement, sacrificing the longevity of semiconductor wafers for dramatic cost reduction and simplified manufacturing
3Reliability
If complex assembly processes are used for LED and photovoltaic device manufacturing, then device reliability is improved, but productivity decreases
Solution Approach 1:
The patent uses PCB copying techniques that enable rapid reproduction of device layouts and circuit patterns through printing processes. Multiple devices can be fabricated simultaneously on large PCB substrates using screen printing or other printing methods, dramatically increasing manufacturing productivity compared to sequential semiconductor wafer processing
Solution Approach 2:
The patent merges multiple manufacturing steps into single integrated processes. PCB fabrication combines conductor trace formation, component placement, and interconnection in unified printing and assembly operations, eliminating the numerous separate photolithography, etching, and deposition steps required in traditional semiconductor manufacturing, thereby increasing productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the production of LED-based devices and photovoltaic panels, making them more affordable and accessible for consumer and business use by leveraging a printing process that suspends and disperses diodes in a solvent or gel medium, allowing for easier and less expensive manufacturing.
Implementation Method 1
A liquid or gel suspension of fully formed, functioning diodes or two-terminal integrated circuits is developed
Implementation Method 2
allowing for printing-based manufacturing using a diode ink composed of diodes, solvents, and viscosity modifiers
Implementation Method 3
a diode ink composed of diodes, solvents, and viscosity modifiers, enabling the creation of LED-based devices and photovoltaic panels
Data Source
AI summary
An exemplary printable composition of a liquid or gel suspension of diodes comprises a plurality of diodes, a first solvent and/or a viscosity modifier. In other exemplary embodiments a second solvent is also included, and the composition has a viscosity substantially between about 100 cps and about 25,000 cps at about 25° C. In an exemplary embodiment, a composition comprises: a plurality of diodes or other two-terminal integrated circuits; one or more solvents comprising about 15% to 99.9% of any of N-propanol, isopropanol, dipropylene glycol, diethylene glycol, propylene glycol, 1-methoxy-2-propanol, N-octanol, ethanol, tetrahydrofurfuryl alcohol, cyclohexanol, and mixtures thereof; a viscosity modifier comprising about 0.10% to 2.5% methoxy propyl methylcellulose resin or hydroxy propyl methylcellulose resin or mixtures thereof; and about 0.01% to 2.5% of a plurality of substantially optically transparent and chemically inert particles having a range of sizes between about 10 to about 50 microns.