Transcript NEW - SMTA

J-STD-001F & IPC-A-610F
Impacts of a New Revision
Frank Honyotski, Master IPC Trainer
(MIT)
STI Electronics, Inc.
AAI Corporation
Agenda
• J-STD-001F
– What’s New
– Additions
• IPC-A-610F
– What’s New
– Additions
• Training
A New Revision of J-STD-001
• What’s New?
– Format
• Removed Space Shuttle symbol
– Layout
• Some requirements relocated for readability
– Revised Requirements
• Where data supported a change
– New Requirements
• To support industry advance
J-STD-001 Terms & Definitions
FOD
• 1.8.3 FOD (Foreign Object Debris)
– A generic term for a substance, debris, particulate matter or article
alien to the assembly or system.
J-STD-001 Requirements
Flowdown
• 1.9 Requirements Flowdown…
– When an assembly, e.g., daughterboard, is procured, that
assembly should meet the requirements of this standard. The
connections from the procured assembly to the manufactured
assembly shall [D1D2D3] meet the requirements of this standard.
– If the assembly is manufactured by the same manufacturer, the
solder requirements are as stated in the contract for the entire
assembly.
– The design and workmanship of COTS items should be evaluated
and modified as required to ensure the end-item meets contract
performance requirements.
– Modifications shall [D1D2D3] meet the applicable requirements of
this standard.
Table 3-1 Maximum Limits of
Solder Bath Contaminant
• The balance of an SAC305 lead-free bath shall
[N1D2D3] be the items listed in Table 3-1.
• Use of other lead-free solder alloy contamination
limits shall [N1D2D3] be on agreement between
Manufacturer and User.
3.8.1 Component and
Seal Damage
• Loss of silver-palladium metallization shall [D1D2D3]:
– Not expose ceramic on the terminal end face.
– Be no greater than 25% of width or thickness on any
termination side (not the end face).
– Be no more than 50% on top of a 5 or 3 sided
termination component.
4.5.1 Gold Removal
• Except as noted above, gold shall [N1PD2D3] be
removed:
– a. From at least 95% of the surfaces to be soldered of the through-
hole component leads with >2.54 μm [100 μin] gold thickness and all
through-hole leads that will be hand soldered regardless of gold
thickness.
– b. From 95% of all surfaces to be soldered of surface mount
components regardless of gold thickness.
– c. From the surfaces to be soldered of solder terminals plated with
>2.54 μm [100 μin] of gold thickness and from all solder cup
terminals, regardless of gold thickness.
Solder Connection Anomalies
• Table 4-1 added to include solder anomalies not just defects.
Table 4-1 Solder Anomalies
Criteria
Class 1
Fractured solder
Disturbed solder
Incomplete reflow of solder paste
Cold or rosin solder
Evidence of dewetting that causes the solder connection to not
meet the solder fillet requirements
Solder has not wetted to the land or termination where solder
is required
Solder that violates minimum electrical clearance
Solder that contacts the component body (except as noted in
other clauses)
Does not comply with wetting criteria of 4.18
Solder bridging except when path is present by design
Blowholes and pinholes providing the solder connection meets
Acceptable
all other requirements
Solder that obscures the stress relief bend of through-hole
Acceptable
components, Note 1
Class 2
Defect
Defect
Defect
Defect
Class 3
Defect
Defect
Defect
Defect
Defect
Defect
Process Indicator
Defect
Note 1: Solder in the bend radius is not cause for rejection provided the lead is properly formed and the topside bend radius is
discernible.
Jumper Wires
• 5.6 Jumper Wires Jumper wires shall [N1D2D3] be
permitted only by drawing(s)/engineering documentation
or other contractual action. When the criteria for jumper
wires is not specified by engineering documentation, the
requirements of 5.6.1 through 5.6.6.4 shall [N1D2D3]
apply. See IPC-7711/7721 and IPC-A-610 for additional
information.
• Jumper wire information now matches 610.
Through-Hole Mounting
and Terminations
• Table 6-2 Components with spacers added to through-hole.
Table 6-2 Components with Spacers
Criteria
Class 1
Class 2
Class 3
Supported holes with spacer in full contact with
both the board and the component.
Acceptable
Acceptable
Acceptable
Supported holes with spacer touching both the
board and the component but not in full contact.
Acceptable
Acceptable
Process
Indicator
Supported holes with spacer not touching either
the board or the component.
Acceptable
Process
Indicator
Defect
Un-supported holes with spacer in full contact with
both the board and the component.
Acceptable
Acceptable
Un-supported holes with spacer not in full contact.
Spacer is inverted.
Defect
No
Requirement
Acceptable
Defect
Defect
Defect
Defect
Hold Down of Surface Mount
Leads/Components
• 7.4 Hold Down of Surface Mount Leads/Components
– Surface mounted device leads or components shall not [N1N2D3]
be pressed down against the PCB land or other mating surface
during the soldering operation or during solder solidification.
– NOTE: Mechanically constrained devices such as connector
securing tabs or holding a part over a pad from the sides during
soldering is not the same as pressing the component down to the
land.
Butt/I Connection-Solder
Charged Termination (NEW)
• 7.5.10.2 Butt/I Connections – Solder Charged
Terminations
– These criteria are for components designed with a hole or holes in
the lead, a bump on the bottom to assure a good (G) fillet
thickness across most of the bottom, and an attached solder slug
to control the amount of solder. Connections formed to soldercharged leads positioned perpendicular to a circuit land in a butt/I
configuration shall [D1D2D3] meet the dimensional and solder fillet
requirements of Table 7-11; see Figure 7-11.
Butt/I Connection-Solder
Charged Termination (NEW)
Feature
Dim.
Class 1
Class 2
Maximum Lead Side Overhang
A
Not permitted
Maximum Lead Toe Overhang
B
Not permitted
Minimum End Joint Width
C
100% of (W)
Minimum Fillet Height
F
Completely wets and fills bottom hole on the termination
Lead Width
W
Note 1
Land Width
P
Note 1
Note 1: Unspecified parameter or variable in size as determined by design
Class 3
P-Style Terminations
(NEW)
• 7.5.18 P-Style Terminations
– Connections formed to components having the P-Style
termination (Figure 7-19) shall [D1D2D3] meet the
dimensional and solder fillet requirements of Table 721. This termination style is typically found on edge
mounted connectors that will be soldered on both sides
of the board.
P-Style Terminations
(NEW)
Table 7-21 Dimensional Criteria – P-Style Terminations
Feature
Dim.
Class 1
Class 2
Class 3
Maximum Side Overhang
A
50% (W)
25% (W) Not permitted
Maximum Toe Overhang
B
Note 1
Minimum End Joint Width
C
50% (W)
75% (W)
100% (W)
Minimum Side Joint Length
D
100% (W)
150% (W)
Minimum Fillet Height – Heel and Toe
F
Note 2
25% (H)
Termination Height
H
Note 3
Minimum Side Fillet Height
J
Note 2
Termination Length
L
Note 3
Termination Width
W
Note 3
Note 1: No part of the ‘‘L’’ portion of the termination extends beyond the land
Note 2: Wetting is evident
Note 3: Unspecified parameter or variable in size, determined by design
10 Coating, Encapsulation
and Staking(Adhesive)
• Entire section reworded and new criteria added.
Witness (Torque/ Anti-Tampering)
Stripe (NEW)
• 11 Witness (Torque /Anti-Tampering) Stripe
– If torque (witness/anti-tampering) stripe is required, the
following criteria shall [N1N2D3] be used:
– a. Be continuous between the fastener and the
substrate.
– b. Be undisturbed.
– c. Extend from the top of the fastener onto the adjacent
substrate (at minimum).
– d. Be aligned with the center line of the fastener.
Appendix C
(NEW)
• J-STD-001 Guidance on Objective Evidence of Material
Compatibility
– Overview
• Most electronics assembly operations are a series of mechanical, thermal, and
chemical processes, each having a potentially adverse effect on the long term
functionality and reliability of the assembled product.
• The average electronic assembly will have been subjected to at least 20
different chemical processes, many employing especially aggressive
chemicals.
• To accurately determine that mixtures of these various chemicals do not
produce adverse effects, the Manufacturer needs to have examined chemical
interactions within their chosen material sets. J-STD-001 has always required
that “objective evidence” of “chemical compatibility” be on hand for review.
• This appendix was generated by a focus group of the J-STD-001 committee to
generate guidance on this issue.
IPC-A-610F
Personnel Proficiency
(NEW)
• 1.3 Personnel Proficiency
– All instructors, operators, and inspection personnel shall be
proficient in the tasks to be performed.
– Objective evidence of that proficiency shall be maintained and
available for review.
• Objective evidence should include records of training to the
applicable job functions being performed, work experience,
testing to the requirements of this standard, and/or results of
periodic reviews of proficiency.
– Supervised on-the-job training is acceptable until proficiency is
demonstrated.
Supported Holes- Solder
• Added criteria for Class 2 vertical fill for components with 14 or
more leads and Less than 14 leads.
Table 7-4 Plated-Through Holes with Component Leads , Minimum Acceptable Solder Conditions1
Criteria
Class 1
Vertical fill of solder for component with less than 14
leads, Notes 2 and 3 (see 7.3.5.1).
A
Vertical fill of solder for component with 14 leads or
more. Notes 2 and 3 and Figure 6-4
Class 2
Class 3
75%
Not specified
50% or 1.2 mm
[0.05 in],
whichever is
less
75%
Note 1: Wetted solder refers to solder applied by any solder process including intrusive soldering. For intrusive
soldering there may not be an external fillet between the lead and the land
Note 2: The 25% unfilled height includes the sum of both source and destination side depressions
Note 3: Less than 100% solder fill may not be acceptable in some applications, e.g., thermal shock, electrical
performance
Chip Components – Billboarding
• Changed the Class 3 Acceptable criteria.
– For components size 1206 or smaller:
• Component has 3 or more termination faces (metallization).
8.3.5 Flat Gull Wing Leads
• Maximum Toe Overhang for Class 2,3
– Not permitted when (L) is less than 3 (W)
Butt/I Connections- Solder Charged
Terminations(NEW)
• Same as J-STD-001F
P-Style Connections
(NEW)
• Same as J-STD-001F
9.2 Chip Resistor Element
• Acceptable – Class 1, 2, 3
– No damage to the resistive element or glass coating.
– No exposure of the resistive element.
• Reference to 1206 size component removed.
9.13 Threaded Items and
Hardware (NEW)
• Defect - Class 1,2,3
– Evidence of damage resulting from over-tightening of
the threaded item.
10.2.4 Laminate
Conditions - Haloing
• Criteria separated from edge delamination.
• Edge delamination combined with Nicks and crazing.
10.4 Flexible and Rigid-Flex
Printed Circuitry
• Criteria changed to more closely align with IPC-A600.
10.5.5.2 Marking – Labels –
Readability
• Removed the laser and wand type scanner and replaced with
code can be read with 3 or fewer attempts.
10.8.4 Electrical Insulation
Coating (NEW)
• This material is used to provide insulation to an
exposed conductor when conformal coating is
insufficient to provide enough protection and
encapsulation is too much.
• All of the considerations used for conformal coating
are applicable for insulation coating, except the
surface where insulation coating is applied is
generally not smooth enough for a uniform coating
surface.
• Thin coating is not a target attribute. See 10.5.2.2
10.8.4 Electrical Insulation
Coating (NEW)
• The material used is frequently a conformal coat like material
with a thickener added.
• Example:
– Bolted solder lugs where the edge surface is not fully protected by
conformal coating
– Component cases that are electively active
– Wire termination, particularly moveable wires
TRAINING
J-STD-001F Certification Course
IPC-A-610F Certification Course
• J-STD-001 Certified IPC Trainer (CIT) and Certified IPC
Application Specialist (CIS) Training Courses
– Currently under development
– CIT Beta class to be held December 8-12, 2014
• IPC-A-610 CIT and CIS Training Courses
– Currently under development
– CIT Beta class to be held February 2-6, 2015
Questions?