Programmable Connection Segments for Post-Fabrication Circuit Reconfiguration
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Solution Overview
Problem
Conventional microelectronic circuits face limitations in modifying circuit elements after microfabrication, requiring constant power to keep added circuit elements on or off and necessitating new photomasks for connections or disconnections, which is costly and slows down throughput.
Innovation Solution
Incorporating programmable materials, such as phase-changeable materials, that can be switched between conductive and non-conductive states using current patterns, allowing for dynamic on/off control of horizontal connections between conductive lines after microfabrication without the need for new photomasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional photomasks are used to modify circuit connections after microfabrication, then circuit functionality can be changed, but manufacturing cost increases and throughput slows down
Solution Approach 1:
The patent applies preliminary action by pre-forming programmable connection segments during the standard microfabrication process. These segments are prepared in advance with phase-changeable materials that can be later programmed to establish or break connections. This eliminates the need for additional photomask steps after fabrication, thereby maintaining high manufacturing throughput while enabling post-fabrication circuit reconfiguration.
Solution Approach 2:
The patent utilizes parameter changes by employing phase-changeable materials that can transition between conductive and non-conductive states through controlled heating. This allows the same physical structure to serve multiple circuit configuration functions without requiring additional manufacturing steps, thus improving adaptability without sacrificing productivity.
2Adaptability or versatility
If new photomasks are created to add or remove circuit elements, then circuit design can be modified, but manufacturing cost increases
Solution Approach 1:
The patent applies universality by creating a single set of photomasks that can serve multiple circuit configuration purposes. The programmable connection segments can be programmed to implement different circuit designs by changing the programming patterns rather than creating new photomasks. This multi-functional approach allows the same hardware structure to support various circuit configurations, reducing photomask costs while maintaining design flexibility.
3Reliability
If constant power is applied to keep added circuit elements on or off, then circuit functionality is maintained, but power consumption increases
Solution Approach 1:
The patent applies periodic action by using pulsed current programming to change the phase state of connection segments. The phase-changeable materials are switched between conductive and non-conductive states through brief, periodic programming pulses rather than requiring continuous power application. This allows the circuit configuration to be maintained without constant power, reducing power consumption while ensuring reliable circuit functionality.
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
Enables flexible and efficient reconfiguration of circuit designs by allowing circuit blocks to be turned on or off independently of power status, reducing operational power requirements and simplifying the manufacturing process.
Implementation Method 1
The phase changeable material can be changed from conducting to non-conducting after microfabrication by using a pattern of current delivered to the phase changeable material
Data Source
AI summary
In a semiconductor device, a device structure is positioned over a substrate, where the device structure includes devices. A wiring structure of the semiconductor device is positioned over the substrate and coupled to at least one of the devices. The wiring structure includes at least one of programmable lines and programmable vertical interconnects, where the programmable lines extend along a top surface of the substrate and the programmable vertical interconnects extend along a vertical direction perpendicular to the top surface of the substrate. The programmable lines and the programmable vertical interconnects include a programmable material having a modifiable resistivity in that the programmable lines and the programmable vertical interconnects change between being conductive and being non-conductive in responsive to a current pattern delivered to the programmable lines and the programmable vertical interconnects.