Method for producing a radome and corresponding radome

Patent metadata

Field	Value
Publication number	US-11005172-B2
Application number	US-201615764460-A
Country	US
Kind code	B2
Filing date	Sep 21, 2016
Priority date	Sep 30, 2015
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

The invention relates to a method for producing a radome, a flexible printed circuit board having a metallic structure being used. Said flexible printed circuit board is embossed and is back-molded with a thermoplastic material and electric contact elements are connected to the flexible printed circuit board. A connector skirt is placed on the contact elements prior to back-molding.

First claim

The invention claimed is:

1. A radome comprising:
a sheet-like plastic element comprising a laminate film connected to a back-molded thermoplastic material, wherein the laminate film is flexible and comprises an etched metallized structure arranged on one side of the laminate film and configured to carry an electric current to heat the radome; and
a contact element arranged on the laminate film and electrically connected to the metallized structure, wherein at least a portion of the contact element protrudes through a connector skirt provided on the laminate film, wherein at least a first portion of the connector skirt is arranged between the laminate film and the back-molded thermoplastic material, wherein at least a second portion of the connector skirt is accessible externally of the radome.

2. The radome as claimed in claim 1 , further comprising
a front panel attached to the plastic element.

3. The radome as claimed in claim 1 ,
wherein the laminate film comprises a polyimide film or a polyethylene naphthalate film.

4. The radome as claimed in claim 1 ,
wherein the back-molded thermoplastic material is arranged on the side of the laminate film having the metallized structure.

5. The radome as claimed in claim 1 ,
wherein the metallized structure comprises copper or aluminum.

6. The radome as claimed in claim 1 ,
wherein the side of the laminate film adjacent to the back-molded thermoplastic material comprises a discrete layer of the laminate having a surface structure obtained by mechanical or chemical pretreatment prior to attachment of the back-molded thermoplastic material such that an interlocking between the laminate film and the back-molded thermoplastic material is achieved, which increases a bond strength between the laminate film and the back-molded thermoplastic material.

7. The radome as claimed in claim 6 ,
wherein the surface structure comprises impressions generated by mechanical stamping of the plastic element.

8. The radome as claimed in claim 1 ,
wherein the laminate film comprises two long sides and two short sides, wherein a first groove-like impression in the laminate film runs between the two long sides, wherein a second and third groove-like impression in the laminate film run from the two short sides toward a center region, each terminating before reaching the first groove-like impression.

9. The radome as claimed in claim 8 ,
wherein the metallized structure comprises strips of metallic material arranged parallel to the first groove-like impression.

10. A radome comprising:
a sheet-like plastic element comprising a laminate film connected to a back-molded thermoplastic material, wherein the laminate film is flexible and comprises an etched metallized structure arranged on one side of the laminate film and configured to carry an electric current to heat the radome; and
a contact element arranged on the laminate film and electrically connected to the metallized structure, wherein at least a portion of the contact element protrudes through a connector skirt provided on the laminate film, wherein at least a first portion of the connector skirt is arranged between the laminate film and the back-molded thermoplastic material, wherein at least a second portion of the connector skirt is accessible externally of the radome,
wherein the back-molded thermoplastic material is arranged on the side of the laminate film having the metallized structure, wherein the metallized structure comprises copper or aluminum,
wherein the side of the laminate film adjacent to the back-molded thermoplastic material comprises a discrete layer of the laminate having a surface structure obtained by mechanical or chemical pretreatment prior to attachment of the back-molded thermoplastic material such that an interlocking between the laminate film and the back-molded thermoplastic material is achieved, which increases a bond strength between the laminate film and the back-molded thermoplastic material,
wherein the surface structure comprises impressions generated by mechanical stamping of the plastic element,
wherein the laminate film comprises two long sides and two short sides, wherein a first groove-like impression in the laminate film runs between the two long sides, wherein a second and third groove-like impression in the laminate film run from the two short sides toward a center region, each terminating before reaching the first groove-like impression.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Nicke Wolfgang
• Rost Thomas
• Schwarz Roland
• Allouis David

Classifications

• H05K2201/09754

  Connector integrally incorporated in the printed circuit board [PCB] or in housing · CPC title

• H05B2203/016

  Heaters using particular connecting means · CPC title

• H01Q1/02

  Arrangements for de-icing; Arrangements for drying-out {; Arrangements for cooling; Arrangements for preventing corrosion} · CPC title

• H05K2203/1327

  Moulding over PCB locally or completely · CPC title

• B29L2031/36

  Plugs, connectors, or parts thereof · CPC title