Bar code and read-out method thereof

Details Bar code and read-out method thereof Bar code and read-out method thereof

1987-06-02

1989-03-14

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235468, G06K 710

Patent

active

048126314

ABSTRACT:
A conventional bar code and a method of reading the same are so adapted that rays are irradiated on the bar code formed on a semiconductor wafer, and that reflected rays from the bar code are read out by a bar code reader to sense the bar code so that a misreading rate is increased by means of reflection of the surface of a wafer and due to the surface profile of the bar code. In contrast, according to a bar code and a method of reading the same in accordance with the present invention, the bar code is formed of a film or the like of aluminum or the like on the semiconductor wafer, and infrared rays are irradiated on the bar code, penetrated infrared rays from the semiconductor wafer being read out by the bar code reader so that a bar code reading may be effectively made without being influenced by reflection of the wafer surface and surface profile with a better S/N ratio and at a lower misreading rate.

REFERENCES:
patent: 3810159 (1974-05-01), Hinks

Affiliated with

Also associated with

Rating

Bar code and read-out method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bar code and read-out method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar code and read-out method thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-895003