This report summarizes the reliability data for Motorola communication
microprocessors fabricated on the 0.42m single polysilicon process in our wafer
fabrication facility, Mos 11, in Austin, Texas. The current devices fabricated using this
process are given in the table below.
DeviceMask SetDesign
Revision
XPC850F98S0.3309 x 3350.42m
XPC860J24A
H96G
XPC860TJ21M0.2338 x 3470.42m
Table 1. Device properties.
All of these devices are currently in their XC phase of product life, which is the
time when design errata are discovered and corrected. Although the 850 and 860 are still
classified as XC devices, they are built using production equipment and processes, and
have completed their reliability qualifications. There are some functional errata on these
devices, which may impact some customers. These errata are expected to be corrected in
revision D of the 860, which we expect to grant MC status to. For a list of current design
errata on these devices, please contact your local Motorola sales person. To locate the
nearest sales office, you can find them on our website at http://mot-sps.com/sales/
sales_web.html
2.0 Assembly / Package Information
B.1
C
Die Size
(mils)
338 x 329
338 x 329
Process
Geometry
0.42m
The XPC850 is assembled in a 256 leaded plastic ball grid array. The XPC860 is
assembled in a 357 lead plastic ball grid array (PBGA). Both packages have been shown
to meet level 3 moisture sensitivity as classified by JEDEC A113. Our volume
production is manufactured in MotorolaÕs Kuala Lumpur, Malaysia facility, however we
have also qualified Citizen Watch Co, in Japan as an alternate assembly site.
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3.0 Family Qualification Strategy
Motorola uses a ÒfamilyÓ qualification strategy which allows sharing of certain
reliability data across a common design rule / fabrication geometries and packaging types.
Reliability data from other Motorola devices which are designed using the same design
rules and wafer fabrication processes are included with this report.
All of the devices in this report have been in production manufacturing for at least 3
years. The data presented in this report is both data from current production material
and historical data used to qualify devices, processes, and wafer fab and assembly sites.
This report will be updated periodically (typically twice/year) with new reliability data
from subsequent qualifications and reliability monitors.
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4.0 Qualification Data
Motorola .42m Process Qualification Summary
The following data shows results of our .42m qualifications:
The following summary briefly describes the various reliability tests included in the
Motorola reliability monitor program.
DYNAMIC EARLY FAIL STUDY (EFR)
This stress is performed to accelerate infant mortality failure mechanisms, which are
defects that occur within the first year of normal device operation. The typical stress
condition is a temperature of 125°C, a voltage of 6V for 5V products and 4.5V for 3.3V
products, and a duration of 168 hours. Devices used in this test are sampled directly after
the standard production final test flow with no prescreening, unless called out in the
normal production flow.
HIGH TEMPERATURE OPERATING LIFE (HTOL) TEST
High Temperature Operating Life (HTOL) test is performed to accelerate failure
mechanism which are thermally activated through the application of extreme temperatures
and the use of dynamic operating conditions. All devices performing the HTOL test are
sampled directly after final electrical test with no prior burn-in or other pre-screening.
Testing is performed per Mil Std 883, Method 1005, with dynamic signaling applied to
the devices for a minimum duration of 168 hours. Some sample groups are extended to
2016 hours.
A device will be considered to have failed the life test if parametric limits are exceeded or
if functionality cannot be demonstrated under nominal and worst case conditions
specified in the data sheet. Forms of mechanical damage, such as cracking of the package,
will be considered as a reject. Device which recovers after baking will also be considered
as a reject. Verified ESD and EOS failures shall not be considered legitimate nor will
failures caused by handling, such as bent leads or cosmetic package defects.
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TEMPERATURE CYCLE (T/C)
Temperature Cycle accelerates the effects of thermal expansion mismatch between
different components of the packaging system, a condition which can cause wire bond
problems and seal leakage. Temperature Cycle is typically performed per Mil Std 750 or
Mil Std 883, Method 1010, Condition D.
Devices are inserted into cycling system and held at -65C for at least ten minutes, devices
are then transferred to a second chamber and held at +150C for at least 10 minutes. The
system employs a circulating air environment to assure rapid stabilization at the specified
temperature. The dwell at each extreme, plus two transition times of five minutes each,
constitute one cycle. The duration of this testing is typically 500 or 1000 cycles.
A device shall be considered as a reject, if hermeticity cannot be demonstrated, parametric
limits are exceeded, or if functionality cannot be demonstrated, as per the data sheet
limits. Mechanical damage, such as cracking, chipping, or breaking of package, will also be
considered as a reject provided such damage was not caused by fixturing or handling.
Verified EOS and ESD failures shall not be considered as legitimate rejects.
TEMPERATURE HUMIDITY BIAS (THB)
This is an environmental test performed at a temperature of 85°C and a relative humidity
of 85% (per JEDEC Standard 22 Method A101). The test is designed to measure the
moisture resistance of plastic encapsulated circuits. A nominal (5V) static bias is applied
to the device to create the electrolytic cells necessary to accelerate corrosion of the
metallization. Typical stress duration is 1008 hours.
A device will be considered to have failed the static temperature humidity bias test if
parametric limits are exceeded, or functionality cannot be demonstrated under normal and
worst case conditions as specified in the data sheet. Device which recovers after baking
shall be considered as a reject. Verified ESD or EOS failures shall not be considered
legitimate rejects.
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AUTOCLAVE (AC)/PRESSURE TEMPERATURE HUMIDITY (PTH)
Autoclave is an environmental test that measures device resistance to moisture
penetration and the resultant effects of galvanic corrosion. It is a highly accelerated and
destructive test performed per JEDEC Standard 22B, Method A110 Code C). Conditions
employed during the test include 121°C, 100% relative humidity, and 15 psig. Corrosion
of the die is the expected failure mechanism. Typical test duration is 144 hours.
A device will be considered to have failed the autoclave test if parametric limits are
exceeded or if functionality cannot be demonstrated under normal and worst case
conditions specified in the data sheet. Verified EOS and ESD failures shall not be
considered as legitimate failures, nor will mechanical damage such as cracking of the
package. Cosmetic package defects and degradation of lead finish and solderability are not
considered as a reject criterion.
PRE-CONDITIONING - VAPOR PHASE (VPR) AND INFRARED REFLOW (IR)
Pre-conditioning is a process which simulates the manufacturing steps involved in
mounting and rework of a surface mount device on to the customer's application printed
circuit board. Different methodologies can be employed for this purpose. Infrared Reflow
uses heaters instead of hot fluorocarbon vapor for the reflow. Vapor Phase Reflow(VPR)
is known to be the most contingent stress to the surface mount devices (per JEDEC
Standard 22, Method A112/3). In vapor phase pre-conditioning, different presoak
conditions are defined such as 85C/85% Relative Humidity(RH)(Class I), 85C/60%RH
(Class II), 30C/60%RH (Class III, IV & V) to simulate different environmental
conditions. Devices are exposed to VPR within 4 hours after the completion of the presoaking process. Three cycles of VPR are performed to the parts, 8 to 10 minutes cool
down time is allowed between VPR immersions. Devices are visually inspected for
package cracks after the final immersion. The pre-conditioning test is conducted prior to
the normal reliability test.
SOLDERABILITY TEST
The purpose of this test is to determine the solderability of device package termination
that are intended to be joined to another surface using solder for the attachment. This test
provides optional conditions for aging and solder the purpose of allowing simulation of
the soldering process to use in the device application. It provides procedures for through
hole, axial and surface mount devices. Leads should be dipped at a solder temperature of
245±5C for a duration of 5-10 seconds (per JEDEC Standard 22, Method A102).
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HIGH TEMPERATURE BAKE (HTB)
The purpose of High Temperature Bake (HTB) is to bake the device for a specified length
of time to determine the stability of the device transistors (per Mil Std 883, Method
1008).
ELECTROSTATIC DISCHARGE (ESD)
This series of stresses included Human Body Model (HBM), Machine Model (MM)
(per JEDEC Standard 22, Method 2007) to determine if the devices cab be handled in a
normal production environment without being damaged by the various sources of static
that are present.
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