Package-Integrated Bowtie Antenna for Low-Dielectric Substrates
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Solution Overview
Problem
Incorporating antennas into microelectronic device packages is challenging due to interference from mold compounds and substrate materials with high dielectric constants, which reduces antenna efficiency and requires additional costly components like printed circuit boards.
Innovation Solution
A multilayer package substrate with conductor layers spaced by dielectric material and coupled by vertical connection layers, incorporating a bowtie antenna and reflector in a conductor layer, allows for efficient antenna integration within the package without separate PCBs, using existing manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If antennas are integrated within the package substrate, then device area is reduced and cost is decreased, but antenna efficiency deteriorates due to high dielectric constant materials
Solution Approach 1:
The patent applies local quality by creating a low dielectric constant region specifically around the antenna structure. The package substrate is designed with a first dielectric material having a first dielectric constant in a first region where the antenna is located, while other regions may use different materials with different dielectric constants. This allows the antenna to operate efficiently in its local environment while maintaining the structural and protective functions of the overall package.
Solution Approach 2:
The patent changes the dielectric constant parameter of the substrate material in the antenna region. By using a dielectric material with a first dielectric constant that is lower than conventional materials (typically lower than 3.0) in the region where the antenna is formed, the patent optimizes the electrical characteristics for antenna operation while maintaining mechanical integrity and protection functions.
2Reliability
If separate PCB substrates are used for antennas, then antenna efficiency is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the antenna structure with the package substrate by forming the antenna directly within conductor layers of the package substrate. The antenna is integrated into the existing multilayer structure using the same conductor layers and dielectric materials that make up the package substrate, eliminating the need for separate PCB substrates or additional antenna carriers.
Solution Approach 2:
The package substrate serves multiple functions: it provides mechanical support, electrical connections, protection for the semiconductor device, and serves as the mounting structure for the antenna. The conductor layers of the package substrate are configured to form both signal transmission paths and the antenna structure itself, making the substrate a multi-functional component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables cost-effective and efficient integration of antennas within microelectronic device packages, improving transmission efficiency and reducing the need for additional components, while maintaining reliable semiconductor die connections.
Implementation Method 1
the multilayer package substrate including conductor layers spaced from one another by dielectric material
Implementation Method 2
a reflector formed in another one of the conductor layers of the multilayer package substrate and spaced from the bowtie antenna by the dielectric material
Data Source
AI summary
A described example includes: an antenna formed in a first conductor layer on a device side surface of a multilayer package substrate, the multilayer package substrate including conductor layers spaced from one another by dielectric material and coupled to one another by conductive vertical connection layers, the multilayer package substrate having a board side surface opposite the device side surface; and a semiconductor die mounted to the device side surface of the multilayer package substrate spaced from and coupled to the antenna.