# US 12,224,475 B2 · Integrated thick film spacer for RF devices

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- Number: US 12,224,475 B2
- Document ID: US12224475B2
- Status: Granted
- Kind: B2
- Application number: 18/536,908
- Filed: 2023-12-12
- Published: 2024-04-04
- Granted: 2025-02-11
- Earliest claimed: 2021-01-21
- Assignees: Raytheon Company
- Applicants: Raytheon Company
- Inventors: Keely M. Musgrove; Mark B. Hanna
- Web page: https://patentgrep.com/patent/US12224475B2

## CPC

- H01P 1/38: Circulators
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 9/005: {comprising one layer of ceramic material, e.g. porcelain, ceramic tile (layered products with at least two ceramic layers composed mainly of ceramic B32B18/00)}
- B32B 15/04: comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)}
- B32B 37/12: characterised by using adhesives
- B32B 38/145: {Printing}
- B41M 1/12: Stencil printing; Silk-screen printing
- H01P 1/36: Isolators
- H01P 1/387: Strip line circulators
- H01P 11/00: Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P 11/003: {Manufacturing lines with conductors on a substrate, e.g. strip lines, slot lines}
- B32B 2255/06: on metal layer
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2255/26: Polymeric coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2307/20: having particular electrical or magnetic properties, e.g. piezoelectric
- B32B 2307/204: Di-electric
- B32B 2307/208: Magnetic, paramagnetic
- B32B 2457/00: Electrical equipment
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## Abstract

A method of fabricating a portion of magnetically controlled signal distribution device includes receiving a substrate and screen printing a low-k dielectric spacer over an upper surface of the surface from a low-k dielectric paste. The method also includes firing the substrate after the spacer has been screen printed thereon, forming an adhesive layer on top of the spacer and securing a magnet to a top of the adhesive layer.

## Claims

### Claim 1

A magnetically controlled signal distribution device comprising:
a substrate having an upper surface;
a screen printed low-k dielectric spacer over the upper surface of the substrate, wherein the spacer is formed from a low-k dielectric paste and is directly on the upper surface of the substrate;
an adhesive layer on top of the spacer; and
a magnet secured to a top of the adhesive layer.

### Claim 2 (depends on 1)

The device of claim 1, wherein the substrate includes metal traces formed on the upper surface of the substrate.

### Claim 3 (depends on 2)

The device of claim 2, wherein the low-k dielectric spacer is directly on top of the metal traces.

### Claim 4 (depends on 1)

The method of claim 1, wherein the low-k dielectric spacer is screen printed directly on top of the upper surface.

### Claim 5 (depends on 1)

The device of claim 1, wherein the substrate includes a ground plane on a side opposite the upper surface.

### Claim 6 (depends on 5)

The device of claim 5, wherein the substrate is a wafer.