Pinards PDF

An Antifuse programming technology is predominantly associated with _____. Antifuse technology is nonvolatile, so it is live at power-up and programming services, either from Actel or from other vendors, are also used. recommended programming practices for antifuse devices. For SoC Antifuse technology is nonvolatile, so it is live at power-up and inherently very secure.

Author: Faulrajas Gagor
Country: Russian Federation
Language: English (Spanish)
Genre: Technology
Published (Last): 1 March 2012
Pages: 345
PDF File Size: 8.42 Mb
ePub File Size: 20.14 Mb
ISBN: 262-6-85800-564-5
Downloads: 51254
Price: Free* [*Free Regsitration Required]
Uploader: Moogulkree

A specialized structure optimized for the purpose can be employed where the antifuse is an integral part of the design. Retrieved from ” technloogy The conductive shunt therefore does not compromise integrity and reliability of the semiconductor device.

Dielectric antifuses employ a very thin oxide barrier between a pair of conductors. Occasionally, the insulation fails to break down on its own, but tapping the blown lamp will usually finish the job.

Views Read Edit View history.

Antifuse – Wikipedia

This technology has many applications. Unsourced material may be challenged and removed. Whereas a fuse starts with a low resistance and is designed to permanently break an electrically conductive path typically when the current through the path exceeds a specified limitan antifuse starts with a high resistance and is designed to permanently create an electrically conductive path typically when the voltage across the antifuse exceeds a certain level. From Wikipedia, the free encyclopedia.

This rapidly causes the antifuse to short out the blown bulb, allowing the series circuit to resume functioning, albeit with a larger proportion of the mains ahtifuse now applied to each of the remaining lamps. This programming, performed after manufacturing, is permanent and irreversible.

The larger, traditional, C7 and C9 style lights are wired in parallel and are rated to progarmming directly at mains voltage. An antifuse is an electrical device that performs the opposite function to a fuse.


When the bulb blows, the entire mains voltage is applied across the single blown lamp. The antifuse is usually triggered using an approximately 5 mA current. With a poly-diffusion antifuse, the high current density creates heatwhich melts a thin insulating layer between polysilicon and diffusion electrodes, creating a permanent resistive silicon link.

In some cases a combined circuit with zeners and transistors can be used to form a zapping matrix; with additional zeners, the trimming which uses voltages higher than the normal operational voltage of the chip can be performed even after packaging the chip.

The insulation of the antifuse wire withstands the ordinary low voltage imposed across a functioning lamp but rapidly breaks down under the full mains voltage, giving the antifuse action. In this way, the failed lamp was bypassed and illumination restored to the rest of the street.

Antifuse programming technology – FPGAs

Formation of the conductive channel is performed by a dielectric breakdown forced by a high voltage pulse. Antifuses are widely used to rpogramming program integrated circuits ICs. Antifuses are best known for their use in mini-light or miniature style low-voltage Christmas tree lights.

May Learn how and when to remove this template message. They may be less susceptible to alpha particles which can cause circuits to malfunction.

One approach for the ICs that use antifuse technology employs a thin barrier of non-conducting amorphous silicon between two metal conductors. For example a precision resistor can be manufactured by forming several series resistors with Zeners in parallel oriented to be nonconductive during normal operation of the device and then shorting selected Zeners to shunt the unwanted resistors. Often a special bulb with no antifuse and often a slightly different rating so it blows first as the voltage gets too high known as a “fuse bulb” is incorporated into the string of lights to protect against the possibility of severe overcurrent if too many bulbs fail.


Amorphous silicon is a material usually not used programmkng either bipolar or CMOS processes and requires an prgramming manufacturing step.

They are historically used especially with antifuuse processes, where the thin oxide needed for dielectric antifuses is not available. Zener diodes can be used as antifuses. When the failed lamp was finally changed, a new piece of film was also installed, once again tecjnology the electrical contacts in the cutout.

Antifuse programming technology – FPGAs

Unlike Christmas lights, tecnhology circuit usually contained an automatic device to regulate the electric current flowing in the circuit, preventing the current from rising as additional lamps burned out.

When a sufficiently high voltage is applied across the amorphous silicon it is turned into a polycrystalline silicon-metal alloy with a low resistancewhich is conductive. Each bit contains both a fuse and an antifuse and is programmed by triggering one of the two. The antifuse is made using wire with a high resistance coating and this wire is coiled over the two vertical filament support wires inside the bulb.

Certain programmable logic devices PLDssuch as structured ASICsuse antifuse technology to configure logic circuits and create a customized design from a standard IC progrramming. The parallel resistors cannot have too low value as that would sink the zapping current; a series-parallel combination of resistors and antifuses is employed in such cases.

The resulting resistance of the junction is in the range of 10 ohms.