×

Non-contact detection of surface fluid droplets

  • US 8,441,268 B2
  • Filed: 04/06/2010
  • Issued: 05/14/2013
  • Est. Priority Date: 04/06/2010
  • Status: Active Grant
First Claim
Patent Images

1. A system for detecting fluid on a substrate comprising:

  • a sensor board;

    a first capacitive sensor mounted on the sensor board, the first capacitive sensor having a transmit sensor pad for transmitting a signal, a receive sensor pad for receiving the signal, and an analog-to-digital convertor connected with the receive sensor pad, wherein a pad gap is formed between the transmit sensor pad and the receive sensor pad, thereby forming an interdigitated finger pattern, and wherein the pad gap is less than 1 millimeter; and

    a platform upon which the substrate is to be placed, wherein the platform is a first distance from the transmit and receive sensor pads.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×