Quality Grades & Reliability

Quality Grades

The available Quality Grades are defined in 3D PLUS Process Identification Document. The Quality Grade of a product is a combination of a temperature range and a screening level.

The available temperature ranges are:

• C: 0 °C / 70 °C
• I: - 40 °C / + 85 °C
• M: - 55 °C / + 125 °C
• S: Specific on customer's demand

The available screening levels are:

• N: Commercial
• B: Industrial
• S: Space (as per European Space Agency qualification)

The combinations of « Temperature Range » and « Screening level » allow serving a broad range of applications and customers’ requirements. For Space applications, «-IB» Quality Grade is used for Engineering Models and «-IS» or «-MS» Quality Grade are used for Flight Models.

Screening Level Description

The screening flow depends on the stacking technology flow used: Standard Packages stacking (Flow 1) or Flex stacking (Flow 2).
In space terminology, Engineering Models (EM) correspond to the Industrial level and Flight Models (FM) correspond to the Space level.
It shall be noted that this standard screening level can be amended through a detail specification / source control drawing.

Technology		Steps & operations	Screening level
Flow 1	Flow 2		Commercial	Industrial	Space
		Applicable documentation
		Process Identification Document (PID)
		Module test specification
		Module detail specification / Source Control Drawing
		Procurement and Element Evaluation for EEE Parts, Mechanical Parts and Materials
		Components and Materials lots traceability
		Components and Materials Lot Acceptance Test (LAT)
		Radiation Lot Acceptance Test (RLAT)			(7)
		Modules manufacturing
		Manufacturing traceability for each module lot
		Flex assembly according to PID
		Electrical test at +25°C – Go / NoGo	(3)	(3)
		Burn-in flex 168hrs +125°C followed by an electrical test at +25°C – Go / NoGo			(2)
		Flex Precap visual inspection before stacking
		Module Manufacturing according to the PID
		Electrical test at +25°C – Go / NoGo
		Modules screening
		Stab. Bake 72hrs +125°C
		Thermal cycles (x10) –55°C/+125°C
		Electrical test at +25°C pre burn-in with R&R
		Burn-in 240hrs / +125°C
		Electrical test at Tmin, +25°C, Tmax, (6)		(Go/NoGo)	(R&R)
		Parameters drift calculation at +25°C
		P.D.A. calculation			(4)
		Final external visual inspection
		Dimensions measurements (3 modules)
		Modules serialization		(1)
		Module Lot Acceptance Test - (7)
		Life test 1000hrs / +125°C
		Electrical test at Tmin, +25°C, Tmax, Post life test with R&R – (6)
		Parameters drift calculation à +25°C
		Final external visual inspection
		Final DPA (1 module)
		Quality Assurance
		Customer source inspection
		Documentation delivered	Delivery Note	Delivery Note + CoC	Delivery Note + EIDP (8)

(1) If option 1 is selected, modules are serialized and components lots traceability is kept through the flow.
(2) If option 2 is selected, a 168hrs burn-in is performed for each flex. Therefore, the module burn-in duration may be reduced to 96 hrs.
(3) If option 3 is selected, each flex is electrically tested.
(4) PDA calculation is in accordance with ECSS-Q-ST-60-05C:
- For Parametric Drift failure, if the number of failed modules exceeds 5% of the number of modules submitted to burn-in and electrical measurements the lot shall be rejected.
- If the cumulative total of Parameter Drift Failures and Parameter Limit Failures exceeds 10% of the number of modules submitted to burn-in and electrical measurements, the lot shall be rejected.
(5) Modules LAT sample according to ECSS-Q-ST-60-05C:

Module lot size	Sample 1e lot	Sample next lots
1 to 25	2	1
26 to 50	3	2
51 to 90	4	3
> 90	5	4

(6) Unless otherwise specified, electrical test temperatures are: Tmin=-55°C and Tmax=+125°C
(7) Generic radiation tests reports are available for every catalogue product. Lot specific radiation tests are performed on demand for a specific product batch.
(8) The End Item Data Package (EIDP) includes all the traceability information for the product (screening summary, embedded parts & materials references, detailed electrical tests results, LAT and DPA reports,).

Harsh Environment

3D PLUS modules are designed to support harsh environments proved by both environmental and mechanical tests.
The table below lists some tests successfully withstood by 3D PLUS modules.

Tests
Stress	Conditions	Test method
Thermal Cycling
Extended Thermal Cycles	500cycles -55° to 125°C	MIL-STD-883 M1010 Cond.B
Extended Thermal Cycles	500cycles -65° to 150°C	MIL-STD-883 M1010 Cond.C
Thermal Cycles under vacuum	10^-6 torr 10 cycles -40°C/+70°C	Specific
Temperature storage
Low Temp Storage	-130°C	Specific
High Temp Storage	2000hrs / 150°C	MIL-STD-883 M1008 JESD22-A103-A
High Temp Operating under pressure	1000hrs / 150°C / 1000bars	Specific
Endurance Testing
Dynamic Life Test	2000hrs / +125°C	MIL-STD-883 M1015
Power Cycling	30K cycles on/off 120s on (+110°C) 60s off (+40°C)	Specific
Resistance to Humidity
THB Test	1000hrs +85°C/85%RH	MIL-STD-202 M103
HAST	264hrs / +110°C	JEDEC STD 22TMA110
Salt Atmosphere (industrial varnished modules)	24hrs	MIL-STD-883 M1009 Cond. AJESD22-A107-A Cond.A
Mechanical Resistance
Mechanical shock	Y1 / 0.5ms / 1500g	MIL-STD-883 M2002 Cond.B
Peak Acceleration	40 000g	Specific
Sine Vibrations	20Hz – 2000Hz Peak acceleration 20g/3axes	MIL-STD-883 M2007 Cond.A
Random Vibrations	// to mating plane 30g/15min To mating plane 30g/15min	MIL-STD-883 M2026 Cond.I Level H/J
Outgassing
Outgassing	TML & RML <1% CVCM <0.1%	ESA-PSS-01-702 MA
Packaging Tests
Lead Integrity		MIL-STD-883 M2004
Solderability		MIL-STD-883 M2003
Marking permanency		MIL-STD-883 M2015
Electrical Sensitivity Discharge
ESD	Human Body Model	ESD JS001-2014

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