Multi-dimensional acoustic charge transport device

Details Multi-dimensional acoustic charge transport device Multi-dimensional acoustic charge transport device

1990-03-05

1991-12-03

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, H01L 4108

Patent

active

050702718

ABSTRACT:
A piezoelectric semiconductor device for greatly increasing the linear channel length and storage capacity of an acoustic charge transport (ACT) device. Synchronized surface acoustic wave devices are aligned approximately orthogonally to each other so that in an angular portion of the channel, the charge packets of an input signal are bent at approximately a 45.degree. angle. As a result, channel length and therefore storage capacity of the channel and ACT device are greatly increased. One embodiment is a 45.degree. angle spiral channel. Another embodiment is a serpentine channel with 45.degree. angle bends.

REFERENCES:
patent: 3963997 (1976-06-01), Hartmann
patent: 4389590 (1983-06-01), Whitlock
patent: 4600853 (1986-07-01), Whitlock et al.
patent: 4611140 (1986-09-01), Whitlock et al.
patent: 4926146 (1990-05-01), Yen et al.

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