LCP for Microwave Packages and Modules ( The Cambridge RF and Microwave Engineering Series )

Publication series :The Cambridge RF and Microwave Engineering Series

Author: Anh-Vu H. Pham; Morgan J. Chen; Kunia Aihara  

Publisher: Cambridge University Press‎

Publication year: 2012

E-ISBN: 9781139415415

P-ISBN(Paperback): 9781107003781

Subject: TM Electrotechnical

Keyword: 电工技术

Language: ENG

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LCP for Microwave Packages and Modules

Description

A comprehensive overview of electrical design using Liquid Crystal Polymer (LCP), giving you everything you need to know to get up-to-speed on the subject. This text describes successful design and development techniques for high-performance microwave and millimeter-wave packages and modules in an organic platform. These were specifically developed to make the most of LCP's inert, hermetic, low-cost, high-frequency (DC to 110+ GHz) properties. First-hand accounts show you how to avoid various pitfalls during design and development. You'll get extensive electrical design details in areas of broadband circuit design for low-loss interconnects, couplers, splitters/combiners, baluns, phase shifters, time-delay units (TDU), power amplifier (PA) modules, receiver modules, phased-array antennas, flexible electronics, surface mounted packages, Microelectromechanical Systems (MEMS) and reliability. Ideal for engineers in the fields of RF, microwave, signal integrity, advanced packaging, material science, optical and biomedical engineering.

Chapter

1.3.3 Test and measurement

1.4 Concluding remarks

2: Characteristics of liquid crystal polymer (LCP)

2.1 LCP chemistry

2.1.1 Liquid crystalline characteristics

2.1.2 Polymeric characteristics

2.2 Electrical characteristics

2.2.1 Dielectric and loss tangent characterization from DC to 60 GHz

2.2.2 Dielectric and loss tangent characterization from 30 to 110 GHz

2.2.3 Electrical characteristics over humidity

2.3 Physical characteristics

2.3.1 Dimensional stability

2.3.2 Adhesion strengths for package integrity

2.3.3 Flexibility

2.4.2 Permeability and leak-rate package testing

2.5 Conclusions

3: Fabrication techniques for processing LCP

3.1 Introduction to LCP material availability

3.1.1 Resin and pellet form

3.1.2 Unclad LCP laminate form

3.1.3 Copper-clad LCP laminate form

3.2 Metallization on LCP

3.2.1 Metal adhesion

3.2.2 Casting

3.2.3 Sputter-plating

3.2.4 Metal lamination

3.3 Standard PCB processing

3.3.1 PCB standard cleaning

3.3.2 PCB standard photolithography

3.3.3 PCB standard drilling and milling

Laser ablation

Mechanical drilling and milling

Evaluating LCP drilling

Laser ablation

Mechanical drilling and milling

Evaluating LCP drilling

3.3.4 PCB standard multilayer lamination

Bonding mechanism

Heterogeneous material lamination

Homogeneous LCP lamination

Bonding mechanism

Heterogeneous material lamination

Homogeneous LCP lamination

3.3.5 Surface finish

3.3.6 Roll-to-roll processing

3.4 Advanced LCP processes

3.4.1 Handling

Photoresist-based mounting technique

Frame mounting technique

Photoresist-based mounting technique

Frame mounting technique

3.4.2 Advanced LCP machining techniques

Mechanical stamping punch

Reactive ion etching

Evaluation of machining for LCP packages

Mechanical stamping punch

Reactive ion etching

Evaluation of machining for LCP packages

3.4.3 LCP air-cavity lid formation

Mechanically drilled air-cavity lid

Lid formed with combination laser and mechanical drilling

Mechanically drilled air-cavity lid

Lid formed with combination laser and mechanical drilling

3.4.4 Selective sealing

Equipment developed for selective sealing

Demonstration prototypes of selective sealing process

Thermal analysis for selective sealing

Equipment developed for selective sealing

Demonstration prototypes of selective sealing process

Thermal analysis for selective sealing

3.4.5 Evaluating planarity after LCP lid sealing

Cross-section evaluation

Cross-section evaluation

3.4.6 LCP molding techniques

3.5 Chapter summary

4: LCP for wafer-level chip-scale MEMS

4.1 Wafer-level chip-scale packaging of an RF MEMS switch

4.1.1 Packaging steps for LCP-encapsulated RF MEMS

4.1.2 Package electrical design

Electromagnetic modeling

Circuit modeling

Electromagnetic modeling

Circuit modeling

4.1.3 Package electrical measurements

4.2 Hybrid phase shifter on multilayer organic multi-chip module

4.2.1 Description of processes

4.2.2 Design of a multi-chip module MEMS phase shifter

Design of true-time delay lines

Fully composed phase shifter

Design of true-time delay lines

Fully composed phase shifter

4.2.3 Packaged phase shifter measurements

4.3 Chapter summary

5: LCP for surface mount interconnects, packages, and modules

5.1 Design process for a thin-film LCP surface mount package and feed-through

Package feed-through design overview

5.1.2 Microstrip line to bond wire transition

5.1.3 Grounded coplanar waveguide (CPWG) below package base

5.1.4 Coplanar waveguide probe launch on test board

5.1.5 Electrical performance sensitivity of package trace thickness

5.1.7 Fabrication of LCP package base

5.1.8 Feed-through measurement and model extraction

5.1.9 Insertion loss roll-off beyond 40 GHz

5.1.10 Package isolation measurement

5.1.11 Measurement and simulation of packaged amplifier

5.2 DC blocked coupled-line interconnect

5.2.1 Coupled-line interconnect design

Bond wire sensitivity

Alignment sensitivity

Material thickness sensitivity

Bond wire sensitivity

Alignment sensitivity

Material thickness sensitivity

5.2.2 Coupled-line interconnect fabrication and measurement results

5.3 DC blocked lumped-element coupled interconnect

5.3.1 Lumped-element interconnect design

5.3.2 Lumped-element interconnect sensitivity analysis

Lateral-offset sensitivity

Coupling-layer-thickness sensitivity

Bond wire sensitivity

Lateral-offset sensitivity

Coupling-layer-thickness sensitivity

Bond wire sensitivity

5.3.3 Lumped-element interconnect measurement results

5.4 Ka-band down-converter multi-chip module (MCM) using LCP SMT packages

5.4.1 Schematic diagram, chip components, and cross-section of module

5.4.2 Design and simulation of signal traces

Package base microstrip line to chip pad bond wire transition

Stripline design for IF output from mixer

Down-converter package prototypes

Package base microstrip line to chip pad bond wire transition

Stripline design for IF output from mixer

Down-converter package prototypes

5.4.3 Assembly and measurements of Ka-band down-converter module

Measurement setup

Initial LNA gain measurement

Conversion gain measurement

Loss analysis of down-converter module

Measurement setup

Initial LNA gain measurement

Conversion gain measurement

Loss analysis of down-converter module

5.5 Chapter summary

6: LCP for passive components

6.1 Broadband LCP Marchand balun

6.1.1 Balun background

6.1.3 Design and simulation of an LCP balun

6.1.4 Electrical measurements on an LCP balun

Measured Marchand balun with even-mode matching

Measured Marchand balun with even-mode matching

6.1.5 Defected ground structure balun

6.1.6 LCP balun summary

6.2 Wilkinson power combiner section

6.2.1 Background and design

6.2.3 LCP Wilkinson summary

6.3 Folded broadband LCP hybrid coupler

6.3.2 Measurement results

6.3.3 Hybrid coupler summary

6.4 Chapter summary

7: LCP for system design

7.1 Wideband thin-film amplitude-compensated LTD circuits implementing MEMS switches

Long time delay design

Long time delay design

7.1.2 Fabrication and measurement results

7.1.3 LTD module summary

7.2 Broadband push–pull PA

7.2.1 Push–pull PA design and fabrication

7.2.2 Push–pull PA module measurement without EMMN

Harmonic distortion measurement

Intermodulation distortion measurement

Harmonic distortion measurement

Intermodulation distortion measurement

7.2.3 Measurement results for a push–pull PA with EMMN

7.2.4 Push–pull PA enabled by LCP summary

7.3 Receiver module with phased-array antenna

7.3.1 Overview of phased-array technology

7.3.3 Passive antenna array design

7.3.5 Phased-array antenna receiver module conclusions

7.4 Chapter summary

8: LCP reliability

8.1 Package vehicle for environmental testing

8.2 Temperature testing

8.2.1 Thermal cycling

8.2.2 Non-operating rapid thermal transition

8.2.3 Non-operating high-temperature storage

8.2.4 Non-operating thermal shock

8.3 Moisture and temperature stressing

8.3.1 Operating humidity exposure (85.°C/85%)

8.3.2 Non-operating moisture resistance

8.3.3 Freeze–expansion stressing

8.4 Mechanical tests

8.4.1 Non-operating mechanical shock

8.4.2 Non-operating vibration

8.5 Conclusions

Abbreviations, acronyms, and symbols

Index

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