Tag Archives: Nitride

Semiconductor Wafer Description Nomenclature (IKB-044)

This article explains the nomenclature used to identify our semiconductor wafer types and specifications, along with the key descriptive criteria to consider when choosing wafers.

Semiconductor wafer selection is key to a successful use of wafers and substrates for your process. Wafers are manufactured with very high precision, with attributes specific to the electronic and mechanical properties and any coatings applied after manufacture.

Wafers are manufactured from four main materials:

  • Silicon
  • Glass and Fused Quartz
  • 3-5 or 2-6 Compound Semiconductors
  • Sapphire

The figure below describes Inseto’s nomenclature chart for Silicon wafers:

Silicon Wafer Nomenclature
Silicon Wafer Nomenclature Chart

The second category of wafers we classify is coated wafers. These are wafers with an added layer either on both the top and bottom surfaces of the silicon or just one of the surfaces – usually the top.

The figure below shows Inseto’s nomenclature chart for Coated Wafers:

Oxide and Nitride Coated Wafer Nomenclature
Oxide and Nitride Coated Wafer Nomenclature Chart

The third category of wafers we classify is glass wafers. These are used when a transparent substrate is required and are categorised by a different set of parameters.

The figure below shows Inseto’s nomenclature chart for Glass Wafers:

Glass Wafer Nomenclature Chart
Glass Wafer Nomenclature Chart

The fourth category we use to classify our wafers is SOI wafers or Silicon-on-Insulator.

These wafers are a sandwich of silicon-insulator-silicon. The insulator is typically silicon oxide or sapphire and the make-up of these is highly specific to the end application.

The figure below shows Inseto’s nomenclature chart for SOI Wafers:

Silicon-on-Insulator SOI Wafer Nomenclature Chart
SOI (Silicon-on-Insulator) Wafer Nomenclature Chart

The fifth category we use to classify our wafers is as SOS – Silicon-on-Sapphire.

These wafers have an EPI Silicon layer on Kr grown Sapphire Wafers. The figure below shows Inseto’s nomenclature chart for SOS Wafers:

SOS Wafer Nomenclature
SOS (Silicon-on-Sapphire) Wafer Nomenclature Chart

The final category we use to classify our wafers is Sapphire.

These wafers are prime grade high quality with C, A and R plane crystal orientation from 2″ to 150mm. They are Single or double side polished have low roughness and are defect free.

The figure below shows Inseto’s nomenclature chart for Sapphire Wafers:

Sapphire Wafer Nomenclature
Sapphire Wafer Nomenclature Chart

For more information on our range of Semiconductor Wafer types, please click “HERE“.

Author

Date

Version

Author

Ian Burnett

Date

26 March 2019

Version

IKB044 Rev. 4

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Finding Wafers Just Got Much Easier

1st April 2020

Inseto launches comprehensive online store for selecting and ordering silicon, silica, glass, coated and SOI wafers.

Andover, United Kingdom

– Inseto, a leading technical distributor of equipment and materials, has added an online store to its website. The store, which carries Inseto’s current inventory of semiconductor wafers, including silicon, silica, glass, coated and silicon on insulator (SOI), features secure online payment and rapid delivery of stocked wafers. Also, Inseto’s online inventory is soon to include sapphire, silicon on sapphire (SoS), lithium niobate, germanium and other materials.

Inseto launches comprehensive online store for selecting and ordering silicon, silica, glass, coated and SOI wafers.
Inseto launches comprehensive online store for selecting and ordering silicon, silica, glass, coated and SOI wafers.

A powerful filtering tool enables users to narrow down their searches by specifying properties common to all wafers, such as diameter and thickness. Then, depending on wafer material, the properties become more specific. For example, silicon wafer properties include ingot growth method, crystallographic orientation, dopant, grade and upper and lower surface resistivity.

The site also carries a Wafer Selection Guide. This is accessible from within the online store and from within Inseto’s Knowledge Base, a repository of freely available, viewable and downloadable articles and guides. Brown concludes. “At Inseto, we’re all about customer support. It’s in our DNA. Also, whilst the online store has greatly speeded the wafer selection and ordering process, our experts remain on hand to offer advice and guidance if anyone does have questions.”

Matt Brown, Director of Inseto, comments: “We have ploughed the combined knowledge of our wafer and supply chain experts into our online store. In our experience, most customers know the exact specifications of the wafers they need, certainly in the case of repeat orders, or they wish to rapidly explore a range of properties and available options.”

To order wafers onlineFor further information on these products please visit: https://www.inseto.co.uk/store/