Method of selectively metallising an inner, electrically insulating surface of an open body

• US 5,798,138 A
• Filed: 03/12/1997
• Issued: 08/25/1998
• Est. Priority Date: 03/18/1996
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Severin, Jan W., Kubbinga, Menno B., Van Veggel, Antonius F. P. M., Legierse, Petrus E. J., Meeuwsen, Franciscus A.
• Primary Examiner(s): Beck, Shrive
• Assistant Examiner(s): PARKER, FREDERICK JOHN
• Application Number:
  US08/815,239
• Time in Patent Office: 531 Days
• Field of Search: 427/230, 427/258, 427/260, 427/428, 427/304, 427/96, 118/211, 118/212, 118/214, 118/215, 101/170, 205/125
• US Class Current: 427/97.4
• CPC Class Codes: C25D 5/022 using masking means
• CPC Class Codes: C25D 7/04 Tubes; Rings; Hollow bodies
• CPC Class Codes: H01J 9/236 Manufacture of magnetic deflecting devices for cathode-ray tubes

Abstract

A method of selectively metallising an inner, electrically insulating surface S_i of an open body (3), comprising the following steps:

(a) providing a roller (2) having a resilient outer surface S_o ;

(b) providing a layer of a suitable wet ink on the surface S_o, according to a given pattern;

(c) causing the roller (2) to roll along the surface S_i so as to impart a patterned layer of wet ink from the surface S_o to the surface S_i ;

(d) allowing the patterned layer of wet ink imparted to the surface S_i to dry;

(e) selectively depositing metallic material upon the patterned layer of dry ink thus obtained.

Such a method is particularly suited to the manufacture of a scan velocity modulator (1) for use in a cathode ray tube.

Claims

1. A method of producing an electrically conductive circuit arrangement on a curved, electrically insulating inner surface S_i of a tubular housing having an open end, said method comprising the following steps:

(a) providing a roller having a resilient outer surface S_o ;

(b) providing a layer of ink on the outer surface S_o of the roller, in a circuit pattern, said ink consisting essentially of a catalyst which promotes electroless deposition of metals or of an electrically-conductive material;

(c) with the roller inserted into the housing through said open end, causing the roller to roll along the inner surface S_i so as to transfer a layer of the ink from the surface S_o to the surface S_i, in the circuit pattern;

(d) allowing the transferred layer of ink on the surface S_i to dry;

(e) selectively depositing metallic material upon the transferred layer of dry ink.

2. A method according to claim 1, where the ink contains a catalyst which promotes electroless deposition of metals, and where step (e) is performed using an electroless procedure.

3. A method according to claim 1, where the ink is electrically conductive, and where step (e) is performed using a galvanic procedure.

4. A method according to claim 1, where the surface S_o of the roller comprises of rubber.

5. A method according to claim 1, where the surface S_o of the roller is substantially smooth and uniform, and where step (b) is performed by rolling the surface S_o over a surface P of a process plate, the surface P containing localised depressions which contain said ink and are positioned and shaped in accordance with the circuit pattern.

6. A method according to claim 1, where the surface S_o of the roller is embossed with said circuit pattern, and where step (b) is performed by rolling the surface S_o over a pad which is impregnated with said ink, or over a plate which is covered with a layer of said ink.