Glazing with frequency selective coating

• US 9,457,425 B2
• Filed: 11/16/2011
• Issued: 10/04/2016
• Est. Priority Date: 11/19/2010
• Status: Active Grant

• Current Assignee: Pilkington Group Limited
• Original Assignee: Pilkington Group Limited
• Inventors: Paulus, Peter
• Primary Examiner(s): CHEN, BRET P
• Application Number:
  US13/885,990
• Publication Number:
  US 20130295300A1
• Time in Patent Office: 1,784 Days
• US Class Current: 1/1
• CPC Class Codes: B23K 2101/18 Sheet panels
• CPC Class Codes: B23K 2101/34 Coated articles , e.g. plated or painted; Surface treated articles
• CPC Class Codes: B23K 2103/172 wherein at least one of the layers is non-metallic
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/54 Glass
• CPC Class Codes: B23K 26/082 Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
• CPC Class Codes: B23K 26/0876 in at least two axial directions
• CPC Class Codes: B23K 26/352 for surface treatment
• CPC Class Codes: B23K 26/355 Texturing
• CPC Class Codes: B23K 26/364 for making a groove or trench, e.g. for scribing a break initiation groove
• CPC Class Codes: B23K 26/40 taking account of the properties of the material involved
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 2218/328 Partly or completely removing a coating
• CPC Class Codes: H01Q 1/1271 for mounting on windscreens
• CPC Class Codes: H01Q 15/0013 said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective

Abstract

A method of manufacturing a glazing having a frequency selective surface comprising the steps of:

a) depositing a coating on a substrate, said coating being non-transmitting to radio frequency (RF) radiation;

b) providing a laser beam and

c) removing a portion of the coating by laser ablation to form one or more curves and/or lines having a spacing selected to provide transparency of the coating to RF radiation of a desired wavelength;

characterized by

d) directing the laser beam and/or moving the substrate such that the relative motion of the intersection of the laser beam and the coating, with respect to the substrate, comprises motion in a first dimension, wherein said motion is simultaneously superimposed with a reciprocating motion in a second dimension;
e) translating said intersection in the second dimension; and
f) repeating at least step d) out of steps d) to f).

Claims

1. A method of manufacturing a glazing having a frequency selective surface comprising the steps of:

a) depositing a coating on a substrate, said coating being non-transmitting to radio frequency (RF) radiation;

b) providing a laser beam; and

c) removing a portion of the coating by laser ablation to form lines in the coating having a spacing selected to provide transparency of the coating to RF radiation of a desired wavelength;

wherein

d) directing the laser beam and/or moving the substrate such that the relative motion of the intersection of the laser beam and the coating, with respect to the substrate, comprises motion in a first dimension, wherein said motion is simultaneously superimposed with a reciprocating motion in a second dimension;

e) translating said intersection in the second dimension; and

f) repeating at least step d) out of steps d) to e) to produce said lines in the coating, said lines in the coating being undulating lines that touch or overlap.

2. A method according to claim 1, where the reciprocating motion comprises a simple harmonic motion.

3. A method according to claim 1, where the reciprocating motion occurs at a constant speed.

4. A method according to claim 1, where the first dimension and the second dimension are substantially perpendicular to each other.