science

Integrated passive devices

Integrated passive devices is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Integrated passive devices rather than just read about it. In short: Integrated passive devices (IPDs), also known as integrated passive components (IPCs) or embedded passive components (EPC), are electronic components where resistors (R), capacitors (C), inductors (L), microstriplines, impedance matching elements, baluns or any combinations of them are integrated in the same package or on the same substrate. Sometimes integrated passives can also be called as embedded passives, and…

Key takeaways

Integrated passive devices belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Integrated passive devices to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Integrated passive devices from memory before moving on to harder problems.

Reference excerpt

Integrated passive devices (IPDs), also known as integrated passive components (IPCs) or embedded passive components (EPC), are electronic components where resistors (R), capacitors (C), inductors (L), microstriplines, impedance matching elements, baluns or any combinations of them are integrated in the same package or on the same substrate. Sometimes integrated passives can also be called as embedded passives, and still the difference between integrated and embedded passives is technically unclear. In both cases passives are realized in between dielectric layers or on the same substrate. The earliest form of IPDs are resistor, capacitor, resistor-capacitor (RC) or resistor-capacitor-coil/inductor (RCL) networks. Passive transformers can also be realised as integrated passive devices like by putting two coils on top of each other separated by a thin dielectric layer. Sometimes diodes (PN, PIN, zener etc.) can be integrated on the same substrate with integrated passives specifically if the substrate is silicon or some other semiconductor like gallium arsenide (GaAs).

Description

Integrated passive devices can be packaged, bare dies/chips or even stacked (assembled on top of some other bare die/chip) in a third dimension (3D) with active integrated circuits or other IPDs in an electronic system assembly. Typical packages for integrated passives are SIL (Standard In Line), SIP or any other packages (like DIL, DIP, QFN, chip-scale package/CSP, wafer level package/WLP etc.) used in electronic packaging. Integrated passives can also act as a module substrate, and therefore be part of a hybrid module, multi-chip module or chiplet module/implementation. The substrate for IPDs can be rigid like ceramic (aluminumoxide/alumina), layered ceramic (low temperature co-fired ceramic/LTCC, high temperature co-fired ceramic/HTCC), glass, and silicon coated with some dielectric layer like silicon dioxide. The substrate can be also flexible like laminate e. g. a package interposer (called as an active interposer), FR4 or similar, Kapton or any other suitable polyimide. It is beneficial for the electronics system design if the effect of the substrate and the possible package to the performance of IPDs can be neglected or known. Manufacturing of IPDs used include thick and thin film technologies and variety of integrated circuit processing steps or modifications (like thicker or different metals than aluminum or copper) of them. Integrated passives are available as standard components/parts or as custom designed (for a specific application) devices.

Applications Integrated passive devices are mainly used as standard parts or custom designed due to

… excerpt ends here. Continue reading the full article.

Illustrations

Integrated passive devices: IPDs (IPCs) Single SMT chip solutions for Bandpass, Lowpass, HighPass, and other combinations based on LC, RC etc. integrated networks on a ceramic substrate — IPDs (IPCs) Single SMT chip solutions for Bandpass, Lowpass, HighPass, and other combinations based on LC, RC etc. integrated networks on a ceramic substrate

Integrated passive devices: Example of RF IPD balun on Glass Substrate — Example of RF IPD balun on Glass Substrate

Worked examples

Example 1 — a first encounter with Integrated passive devices

Start with the simplest possible case. Write down what Integrated passive devices claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Integrated passive devices before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Integrated passive devices ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Integrated passive devices

In research: Integrated passive devices appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Integrated passive devices in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Integrated passive devices is common in secondary-school and first-year university syllabi. It links to neighbouring topics Electronic design, so understanding it makes those chapters shorter.
In everyday life: Look for Integrated passive devices outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Integrated passive devices in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Integrated passive devices means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Integrated passive devices out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Integrated passive devices in simple terms?

Why does Integrated passive devices matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Integrated passive devices?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Integrated passive devices.