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Varactor diode, tuning diode: USMBB179 Single Varactor (Tuning) Diode 20pF same as LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 manufactured by US Microwaves - Gold chip technology for known good varactor diode die, varactor diode flip chip, varactor diode bare die, wafer foundry for discrete semiconductors, microwave integrated circuits and advanced microwave components manufactured by US Microwaves
Varactor diode, tuning diode: USMBB179 Single Varactor (Tuning) Diode 20pF same as LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 manufactured by US Microwaves - Gold chip technology for known good varactor diode die, varactor diode flip chip, varactor diode bare die, wafer foundry for discrete semiconductors, microwave integrated circuits and advanced microwave components manufactured by US Microwaves. Gold metallization for interconnections instead of aluminum or copper, for high reliability devices for system in package applications using silicon printed circuit boards, ceramic substrates or chip on board, assembled via flip chip or chip and wire.
Varactor diode, tuning diode: USMBB179 Single Varactor (Tuning) Diode 20pF same as LRC BB179, LRC BB179, LRC
BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 manufactured by US Microwaves - Gold
chip technology for known good varactor diode die, varactor diode flip chip, varactor diode bare die, wafer foundry for
discrete semiconductors, microwave integrated circuits and advanced microwave components manufactured by US Microwaves
Varactor diode, tuning diode: USMBB179 Single Varactor (Tuning) Diode 20pF same as LRC BB179, LRC BB179, LRC BB179,
NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 manufactured by US Microwaves - Gold chip
technology for known good varactor diode die, varactor diode flip chip, varactor diode bare die, wafer foundry for
discrete semiconductors, microwave integrated circuits and advanced microwave components manufactured by US Microwaves.
Gold metallization for interconnections instead of aluminum or copper, for high reliability devices for system in
package applications using silicon printed circuit boards, ceramic substrates or chip on board, assembled via flip chip
or chip and wire. US MICROWAVES Single Varactor (Tuning) Diode 20pF Advanced Microwave Components USMBB179 - FLIP CHIP
FEATURES APPLICATIONS VARACTOR DIODE - FLIP CHIP Gold metallization RoHS compliant, Lead Free High reliability flip
chip Unique new design Compatible with both chip and wire, flip chip and surface mount assembly. Chip on Board, System
in package SIP Hybrid Circuits Parametric amplifiers, Parametric Oscillators Voltage-controlled oscillators, PLL
circuits Frequency synthesizers USMBB179 BB179 Single Varactor (Tuning) Diode 20pF VARACTOR DIODES - PRODUCT
DESCRIPTION AND SHORT APPLICATION NOTE Varicap Diode, Varactor Diode, Variable Capacitance Diode or Tuning Diode is a
type of diode which has a variable capacitance that is a function of the voltage impressed on its terminals. Varactors
are operated reverse-biased so no current flows, but since the thickness of the depletion zone varies with the applied
bias voltage, the capacitance of the diode can be made to vary. Generally, the depletion region thickness is
proportional to the square root of the applied voltage; and capacitance is inversely proportional to the depletion
region thickness. Thus, the capacitance is inversely proportional to the square root of applied voltage. All diodes
exhibit this phenomenon to some degree, but specially made varactor diodes exploit the effect to boost the capacitance
and variability range achieved - most diode fabrication attempts to achieve the opposite. Varactors are principally
used as a voltage-controlled capacitor, rather than as rectifiers. They are commonly used in parametric amplifiers,
parametric oscillators and voltage-controlled oscillators as part of phase-locked loops and frequency synthesizers.
Flip Chip Varactor diode series are available in die form in four different pad compositions: -FC, -GB, -GT and -AN.
These products are ideal for high reliability hybrid circuits, multi chip module applications and surface mount
applications. HIGH RELIABILITY BARE DIE AND SYSTEM IN PACKAGE - SHORT APPLICATION NOTE COB (Chip on Board) and SiP
(System-in-Package) are integrating proven mature products in bare die of mixed technologies i.e. Si, GaAs, GaN, InP,
passive components, etc that cannot be easily implemented in SOC (System-on-Chip) technology. COB and SiP have small
size footprint, high density, shorter design cycle time, easier to redesign and rework, use simpler and less expensive
assembly process. For extreme applications the bare die has to withstand also harsh environmental conditions without
the protection of a package. KGD, Known Good Die concept is no longer satisfactory if the die cannot withstand harsh
environmental conditions and degrades. Standard semiconductor devices supplied by many manufacturers in bare die are
build with exposed aluminum pads that are extremely sensitive to moisture and corrosive components of the atmosphere.
US Microwaves has reengineered industry standard products and now offers known good die for bare die applications with
gold interconnection and well-engineered materials that further enhance the die reliability. US Microwaves also offers
Silicon Printed Circuit Board technology with integrated passive components as a complete high reliability SIP solution
for medical, military and space applications. DISCRETE SEMICONDUCTORS MANUFACTURING PROCESS Discrete semiconductors are
manufactured using US Microwaves in house high reliability semiconductor manufacturing processes. All semiconductor
devices employ precision doping via ion implantation, silicon nitride junction passivation, platinum silicided contacts
and gold interconnect metallization for best performance and reliability. MNOS capacitors, Tantalum Nitride TaN or
Sichrome SiCr thin film resistors are easily integrated with discrete semiconductors on same chip to obtain standard
and custom complex discrete device solutions. All thin film microwave products are manufactured using advanced
semiconductors and thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold
interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability.
Thin film technology is the preferred solution for all applications that require low noise, long term stability and
excellent performance at very high frequencies. US Microwaves employs proprietary thin film technologies for deposition
of a wide range of resistive films with sheet resistance films from 1Ω/sq to 10,000Ω/sq. All US Microwaves products
are available in die form and are ideal for high reliability hybrid and multi chip module applications. All US
Microwaves products are manufactured using GOLD CHIP TECHNOLOGY™ a trade mark of Semiconix Corporation. Maximum
Ratings at TA = 25°C, unless otherwise specified Parameter Symbol Value Unit Diode reverse voltage VR 30 V Forward
current IF 20 mA Operating temperature range Top -55 ... 150 °C Storage temperature Tstg -55 ... 125 °C Electrical
Characteristics at TA= 25°C, unless otherwise specified Name Symbol Test Conditions Value Unit Min. Typ. Max Reverse
current IR1 VR=30V 10 nA Reverse current IR2 VR=30V;Tj=85grdC 200 nA Diode capacitance CT1 VR=1V,f=1MHz 18.22 21.26 pF
Diode capacitance CT2 VR=28V,f=1MHz 1.951 2.1 2.225 pF Capacitance ratio CT1/CT2 VR=1 V, VR=2 V, f=1 MHz 1.27
Capacitance ratio CT1/CT28 VR=1 V, VR=28 V, f=1 MHz 8.45 9 10.9 Capacitance ratio CT25/CT28 VR=25 V, VR=28 V, f=1 MHz
1.05 Capacitance matching1) DCT/CT VR=1 V to28V; in a sequence of 10diodes 2 % Series resistance rS f=470MHz; Cd=9pF
0.6 0.75 Ω CROSS REFERENCE PARTS: LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips
BB179 GENERAL DIE INFORMATION Substrate Thickness [mils] Size mm [mils] Bonding pads dimensions per drawing Backside
Silicon 10±2 0402 1.02x0.51 [40x20] Type Pad metal Thickness Assembly -FC TiW/Au 4µm±1 Wire bonding or Silver epoxy
-GB TiW/Au 25µm±2.5 Thermosonic -GT Ti/Pt/AuSn 5µm±1 Reflow -AN Ni/Au 5µm±1 Solder reflow Optional backside
coating and/or marking. LAYOUT / DIMENSIONS / PAD LOCATIONS Click to select process: -FC -GB -GT -AN USMBB179 LRC
BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 Single Varactor
(Tuning) Diode 20pF USMBB179 LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179
NXP_Philips BB179 Single Varactor (Tuning) Diode 20pF wire bonding USMBB179 LRC BB179, LRC BB179, LRC BB179,
NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 Single Varactor (Tuning) Diode
20pFthermosonic USMBB179 LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179
NXP_Philips BB179 Single Varactor (Tuning) Diode 20pFthermal USMBB179 LRC BB179, LRC BB179, LRC BB179, NXP_Philips
BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 Single Varactor (Tuning) Diode 20pFsolder reflow USMBB179
LRC BB179, LRC BB179, LRC BB179, NXP_Philips BB179, NXP_Philips BB179, NXP_Philips BB179 NXP_Philips BB179 Single
Varactor (Tuning) Diode 20pF SEMICONDUCTOR ASSEMBLY PROCESS - SHORT APPLICATION NOTE US Microwaves flip chip components
are designed for dry assembly processes as well as for processes that use adhesives, fluxes etc. Dry assembly process
is an assembly process that does not use additional solders, fluxes or adhesives. Thermosonic wire bonding is a dry
assembly process. US Microwaves Flip Chip -FC series can be also used for thermosonic wire bonding. US Microwaves Gold
Bump -GB series are flip chips that are thermosonically attached to a circuit. US Microwaves Gold Tin -GT series are
flip chips with Au/Sn, 80/20 metallized pads. GT series can be attached to circuits by bringing the die in contact with
a substrate which temperature is more than 280°C. Upon cooling bellow 280C, the die is firmly welded to the substrate.
Flux less dry assembly is most reliable but is also most expensive because of thick gold bumps or expensive Au/Sn
process. US Microwaves -FC series is designed to be used for flip chip assembly with conductive silver epoxy. It is a
simple and inexpensive process consisting of 3 steps: - transfer a thin conductive epoxy layer onto the bonding pads;
-align to substrate and attach; -cure silver epoxy and inspect. Same procedure may be used also with -GB series in
certain applications. US Microwaves Gold/Nickel -AN series is the most efficient wafer level chip size package W-CSP
designed for mixed surface mount and flip chip applications. The assembly process is same as for packaged surface mount
components. The process consist of at least 3 steps; -screen print solder paste on the printed circuit board; -flip
chip, align and attach to the tacky solder paste; -dry paste, reflow at T>220°C, clean, etc. US Microwaves Flip
Chip -AN series are available in many sizes with landing pads compatible with the industry standard CSP as well as
surface mount packages. STANDARD PRODUCTS ORDERING INFORMATION VERSION SMX P/N WAFFLE PACKS QUANTITY U/P($) FILM FRAME
MIN QUANTITY U/P($) Flip chip USMBB179-FC -WP 10000 -FF 45000 Flip chip USMBB179-FC -WP 50000 -FF 225000 Gold Bump
USMBB179-GB -WP 10000 -FF 45000 Gold Bump USMBB179-GB -WP 50000 -FF 225000 Gold-Tin USMBB179-GT -WP 10000 -FF 45000
Gold-Tin USMBB179-GT -WP 50000 -FF 225000 Gold/Nickel USMBB179-AN -WP 10000 -FF 45000 Gold/Nickel USMBB179-AN -WP 50000
-FF 225000 LEAD TIMES - Typical delivery for standard products is 4-6 weeks ARO. For custom devices consult factory for
an update on minim orders and lead times. CONTINOUS SUPPLY - US Microwaves guarantees continuous supply and
availability of any of its standard products provided minimum order quantities are met. CUSTOM PRODUCTS - For custom
products sold as tested, bare die or known good die KGD, there will be a minimum order quantity MOQ. Dice are 100%
functional tested, visual inspected and shipped in antistatic waffle packs. For high volume and pick and place
applications, dice are also shipped on film frame -FF. For special die level KGD requirements, different packaging or
custom configurations, contact sales via CONTACTS page. SAMPLES - Samples are available only for customers that have
issued firm orders pending qualification of product in a particular application. ORDERING - US Microwaves accepts only
orders placed on line by registered customers. On line orders are verified, accepted and acknowledged by US Microwaves
sales department in writing. Accepted orders are non cancelable binding contracts. SHIPING - Dice are 100% functional
tested, visual inspected and shipped in antistatic waffle packs. For high volume and pick and place applications, dice
are also shipped on film frame -FF. Products sold for space, military or medical applications, element evaluation
and/or level K or S qualification are subject to minimum order levels to be established on a case by case basis. For
any special applications, die level KGD qualification requirements, different packaging or custom configurations,
contact sales department. /cgi-bin/rfq.cgi" method="post" target="new"> INSTANT QUOTE US
Microwaves P/N Quantity E-mail ORDERING: Order on line HERE. A copy of the order along with an order confirmation
receipt is issued instantly for all orders placed on line. On line Orders have to be verified, accepted and
acknowledged by US Microwaves sales department in writing before, becoming non cancelable binding contracts. DELIVERY:
Typical delivery for die products packaged in waffle packs is 2-4 weeks ARO. For Custom designs, delivery is 3-5 weeks
ARO. Certain items may be available from stock with delivery up to 1 week. SHIPPING/PACKAGING: All devices for chip and
wire applications are 100% tested, visual inspected and shipped in waffle packs (WP). For larger orders,>10k pc,
devices can be shipped on film frame. For smaller quantities, it may vary. For high volume automated assembly, devices
may be supplied as 4" wafers 100% tested, inked and diced on expanded film frame (FF). SAMPLES: Samples are
available only for customers that have issued firm orders pending qualification of product in a particular application.
GUARANTEED SUPPLY! US Microwaves guarantees continuous supply and availability of all standard products provided
minimum order quantities are met. U.S. Microwaves has made every effort to have this information as accurate as
possible. However, no responsibility is assumed by U.S. Microwaves for its use, nor for any infringements of rights of
third parties which may result from its use. U.S. Microwaves reserves the right to revise the content or modify its
product line without prior notice. U.S. Microwaves products are not authorized for and should not be used within
support systems which are intended for surgical implants into the body, to support or sustain life, in aircraft, space
equipment, submarine, or nuclear facility applications without the specific written consent of U.S. Microwaves. Home
Product Tree Tech. Support PDF Request Quote Inventory Place Order Contact sales Last updated: US MICROWAVES www.semiconix-semiconductor.com Tel:(408)986-8026 Fax:(408)986-8027 ©1990- US MICROWAVES All rights reserved. No
material from this site may be used or reproduced without permission.
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