Stevenage Circuits Group · Multi-seat Perfectest for layer registration data Ink jet printer for...
Transcript of Stevenage Circuits Group · Multi-seat Perfectest for layer registration data Ink jet printer for...
Stevenage Circuits Group
Incorporating:
Stevenage Circuits
Tru-Lon Printed CircuitsMarch 2011
The Organisation
� Stevenage Circuits formed 1971
� Tru-Lon integrated into the Stevenage site March 2011
� Group privately owned
� £11m turnover, potential £15m turnover� £11m turnover, potential £15m turnover
� 150 staff / 70,000 square feet
� 24 / 7 working hours since November 2010
� ~£20m worth equipment
� Dedication to investment
� Full range of products including PTFE processing
Key Staff� Stuart Spink CEO� Mark Brown HR Director� Rob Brown Sales and Marketing Director� David Brown Operations Director� Jeremy Rygate Engineering Director� Rosemary Burt Company Secretary� Rosemary Burt Company Secretary� Tim Gee Operations Manager� Jonathan Calver Process Engineering Manager� Beverley Cording Quality Management Systems Manager� Lee Naylor CAM Supervisor� David Wyllie Sales Manager� David FitzGerald Area Sales Manager� John Wood Area Sales Manager� Alaistar Waddell Area Sales Manager
Key Staff
Continued...
Phil Firth Engineering ManagerPaul Estwick Quality Control ManagerPaul Estwick Quality Control ManagerNeil Butler Internal SalesMarc Holloway IT Manager
Qualifications currently held
� Underwriters Laboratories - UL94V0 (Rigid FR4, Flexi-Rigid, Flexible, Rigid Polyimide)
� BS EN ISO 9001:2008 (Quality System Approval)� ISO14001 (Environmental)� ISO14001 (Environmental)� IPC Class 3 manufacture and test (Int. standard)� COSHH (System of controlling hazardous substances)� CECC/IECQ (BS123000)
� D/S, M/L, Flexis, Flexi Rigid� FR4, Reinforced Polyimide, Flex Polyimide� Blind, buried, laser or mechanically drilled� Variety of finishes
CECC
� Certificates:
CECC (cont)
� Capability
Qualifications currently sought
� IPC Class 3 – formal release May 2011
� AS9100 (Aerospace Approval) March 2011
Investment in 2010 / 2011
� Thin core cut sheet laminator
� Loaders / unloaders (LDI, DES, pre-treat lines)
� Orbotech Discovery AOI
� 5 x Orbotech InCAM Front End systems� 5 x Orbotech InCAM Front End systems
� New Class 10,000 clean room
� ESI Laser drill upgrade
� Effluent plant
� Visper Automatic Final Inspection machine
� Total cost ~ £1.5m
Product sectors
� Military
� Aerospace
� Medical
� Telecoms� Telecoms
� Security
� Entertainment
� Sport
� Domestic
� Automotive
UK, Europe and further
Product mix
Rigid 12-22 Layer
Miscellaneous
PTHPTH
Flexible
Flexi-Rigid
Rigid 4-10 Layer
Examples
� Military� 49,500 holes
� 10 levels blind / buried
� Reinforced polyimide� Reinforced polyimide
� Tg 260 deg C
� 4 oz copper
� Controlled depth rout
� Aerospace� D/S Flexi
� 50 micron blind laser drilled vias in 125 micron pads
Examples (cont)
in 125 micron pads
� Super finish (Ni / Pd / Au)
� Flexible solder resist
� 90 micron track / gap
� Medical Implant -2mm x 1mm laser
routed
4 layer rigid, 2 x blind
Examples (cont)
4 layer rigid, 2 x blind vias
Inserted into capsule, then swallowed
4 layer F/RFlexible O/LTrack height 18 microns100 micron track / gap to +/- 6 micronsAdhesiveless flexiTrack pitch to +/- 12 microns
� Telecoms
Edge plated fingersMicrowave - PTFE alternatives
All laser drilled and LDI4 layer, 1-2, 2-3, 3-4, 1-4 drilling
All laser drilled
Examples (cont)
All laser drilled and LDI.6 layer.
1-2, 2-3, 3-4, 4-5, 5-6, 1-6 drilling
� Security25 micron PTHs in 50 micron tracks with 50
micron gaps
Examples (cont)
Examples (cont)
� Entertainment
6 layer Flexi - Rigid
Photogragh reproduced kind permission of Active Silicon www.activesilicon.co.ukwho specialise in the design, manufacture and supply of specialist digital imaging products and technologies
� Research
6 layer stepped flexible with 1-2, 2-3, 3-4, 4-5, 5-6, 1-6 drilling
Examples (cont)
OthersStepped boards
Flying leads
Metal backed PTFE
Special Equipment� 4 x Laser drill - UV YAG� 2 x Laser Direct Image (LDI) – 2 mil Track / Gap and Solder Resist� Auto-align outer layer & solder resist printers� Vacuum and High Temp bonding presses for PTFE� Specialist routers (Tru-Lon) for thick metal backing (Brass, Copper,
Aluminium)� Post etch punches and X-ray drill� Post etch punches and X-ray drill� Permanganate and Plasma desmear / clean� Vacuum laminator� Multi-seat Perfectest for layer registration data� Ink jet printer for serialisation / legend� Resin fill machine� Polar TDR Impedance measurement� Struers microesectioning system (auto-profiling and sectioning)
Special Software
� Genesis 2000 CAM stations (10 licences)� InCAM (5 licences) – latest State of the Art CAM software� Softwires PCP 2000 CIM system dedicated to PCB
manufacture� Lab Wizard for chemical analysis� Lab Wizard for chemical analysis� Track Pro for calibration� Pirana for maintenance� In-house software for Capacity Planning� Polar SI 8000 (Impedance modelling)� InStack (Simultaneous Impedance and Build-up modelling)� Q-Pulse for document control
Genesis 2000 CAM
Controlled Impedance
Laser drillESI 5200 UV YAG
Laser drill microsections
� All laser drilled into reinforced polyimide
Blind vias
Buried via
PTH
Laser drill techniquesIllustrations (c) 2004 Electro Scientific Industries, www.esi.com, used with permission.
Blind holes
Stage 1
Stage 2
Through holes
Laser drill SEMs
Photos (c) 2004 Electro Scientific Industries, www.esi.com, used with permission.
Laser direct imaging (LDI)� Orbotech
Outer Layer and Solder Resist exposure
� Bacher - auto registration
Visper Automatic Final Inspection machine
Class 10,000 clean room (Feb 2011)
Materials� Woven Glass Reinforced (Rigid)
� Standard FR4 (Tg 135°C) incl. Halogen free
� FR4 suitable for lead-free assembly
High Tg FR4� High Tg FR4• Withstands higher temperatures (Tg 175°C and
210ºC)
� Stablcor• Low CTE in X/Y, low weight, high stiffness, high
thermal conductivity
� Polyimide• High Tg of 260 °C, low TCE (z), low Df
Materials
� Suitable for lead-free assembly could be:
� >Tg 150°C (Standard FR4 is 135°C)
� >Td 330 °C (Standard FR4 is 300°C)� >Td 330 °C (Standard FR4 is 300°C)
� >T260 15minutes (Standard FR4 is 4 mins)
� IPC define as IPC 4101B/99, 101, 121, 124, 126, 129
Materials (IPC defined for lead-free)
IPCIPCIPCIPC----4101B4101B4101B4101B 99999999 101101101101 121121121121 124124124124 126126126126 129129129129ANSIANSIANSIANSI FR4 FR4 FR4 FR4 FR4 FR4
Fillers > 5%Fillers > 5%Fillers > 5%Fillers > 5% Yes Yes N/A N/A Yes N/A
TgTgTgTg >150°C >110°C >110°C >150°C >170°C >170°C
TdTdTdTd >325°C >310°C >310°C >325°C >340°C >340°C
CTE 50CTE 50CTE 50CTE 50----260260260260°°°°CCCC <3,5% <4% <4% <3,5% <3,0% <3,0%
T260T260T260T260 >30min >30min >30min >30min >30min >30min
T288T288T288T288 >10min >5min >5min >10min >15min >15min
Materials (cont)
� Random Aramid Reinforcment (Rigid)� Epoxy or polyimide based
� Easily laser ablatable� Easily laser ablatable
� Improved, repeatable dimensional stability
� Ideal for sequential build up (SBU)
� Resin only� e.g. RCC (Resin Coated Copper)
� ideal for laser drilling outer layers
� must be attached to a rigid core
Materials (cont)
� High frequency applications� PTFE
• Optimum frequency range 1-90 GHz• Optimum frequency range 1-90 GHz
• Low Dk ~ 2.3
• Low Df ~ 0.001
• Metal backed
� PTFE alternatives• Optimum frequency range 100MHz - 15GHz
• Dk ~ 3.38 / 3.48
• Df ~ 0.0022 / 0.004
Materials (cont)
� Flexible� Polyimide (Kapton™) base and coverlays
� Epoxy, acryllic, pure polyimide adhesives� Epoxy, acryllic, pure polyimide adhesives
� Single, double sided and multilayer structures
� Thin and low weight
Materials (cont)
� Copper� 2µm - 140µm copper thickness
� Can be used for electrical and thermal � Can be used for electrical and thermal conductivity
� Thick copper can be used for rigidity if placed near outer layers
� Copper / Invar / Copper (used for restraining purposes for TCE matching)
Materials (cont)
� New generation laminates� Hole filling pre-preg with High Tg
� Enhanced Epoxy for Tg > 210 deg C� Enhanced Epoxy for Tg > 210 deg C
� SI glass for optimum signal integrity and precise impedance
� We are constantly examining new materials with our suppliers, who are always prepared to discuss further requirements with our customers
Board types / technologies� M/L up to 24 layers (releasable to BS123000 series)� Sequentially built and Stepped boards� Flexi and flexi rigid� Exotic materials e.g. metal backed PTFE (Copper, Aluminium, Brass)� Buried Resistors using Ohmega-Ply(+/- 15% std, +/-10% special)� Buried Capacitors using 3M’s licence free material� Buried vias (mechanically or laser drilled)� Buried vias (mechanically or laser drilled)� Blind vias (mechanically or laser drilled)� Copper filled blind microvias� Microvias (< 0.15mm diameter)� Resin filled through vias� Laser profiling� Controlled Impedance (+/- 10% std, +/- 5% special)� Edge plated fingers and plated 1/2 holes� Variety of finishes� Embedded fibre optics
Research and Development
� Dedicated Process Engineering Dept.
� Optical Waveguides
� Stretchable PCBs� Stretchable PCBs
� Embedded components
Processes available
� Metalisation by Direct Plate (Shadow) or Electroless� Electrolytic copper plate by Pulse or DC plating� Finishes:
� Ni / Au� Ni / Au� Immersion Tin� HASL (leaded and unleaded subcontract)� Ni / Pd / Au (sub-contract)� Tin / Lead� Silver� Electroplated Hard and Soft Gold
Processes available (cont)�Spray coat green, red and blue solder resist plus other colours available by screen printing�Flexible coverlay
�Laser routed sheet polyimide (or post ablate)�Photoimageable flexible solder resist (brown, black, white)�Photoimageable flexible solder resist (brown, black, white)�Photoimageable dry film
�Extensive conveyorised lines and auto load / unload machines to “de-skill” processes
�Laser structuring (copper pattern and solder resist)
�Complete Engineering back-up from product conception to post delivery
Resin filled vias
Copper filled vias
Copper filled viasExample with stacked vias
Design Rules and Structures� 3 mil track / gap if plated (2 mil track and gap as special)
� 2 mil track / gap if unplated
� 2 mil registration solder resist to copper pattern
� 3 mil minimum webbing solder resist� 3 mil minimum webbing solder resist
� 6 mil PTH to copper track / plane
� 16:1 aspect ratio for PTHs (Thickness : Finished Hole Size)
� 1:1 aspect ratio for blind holes (Thickness : FHS)
� Buried resistors (+/- 15% std, +/-10% special or in parallel)
� Controlled Impedance (+/- 10% std, +/- 5% special)
Copper feature to be at least Layer 0.175mm away from drilled hole
1 Track (75 micron)
2
3
4
5
Standard PTH technology
6
7
8
Pad size at least 0.20mm bigger than drilled hole
Drilled hole diameter 0.15mm minimum.Finished Hole Size (FHS) 0.1mm less.
Aspect ratio (thickness : FHS) 16:1 maximum.
PTH Laser drilled blind vias 1-2, 7-8
Layer Capture pad size to be at least 0.20mm more than drilled hole
Target pads can be 0.2mm diameter1 for 0.1mm hole
2
3
4
Laser drilled blind vias
5
6
7
8
Target pad size to be at least 0.1mm more than drilled hole
Laser vias can exit to surface mount padson outer layers, with very little solder loss. Drill diameter 0.025mm - 0.2mm (0.1mm - 0.15mm typi cal)
Aspect ratio 1:1 max after plating
PTH Buried vias 2-3, 6-7
Layer Pad size to be at least 0.25mm more than drilled hole
1
2
3
4
Buried vias
5
6
7
8
Drilled hole diameter 0.025 - 0.2mmCan be laser drilled
Aspect ratio 16:1 maximum
L a s e r b l in d s e q u e n t ia l b o n d
Buried PTH Laser drilled blind hole 1-2, 7-8(resin filled) as described earlier
Layer
1
2
3
4
Buried PTH Laser drilled blind hole 1-2, 7-8(resin filled) as described earlier
Layer
1
2
3
4
5
Laser blind sequential bond
4
5
6
7
8
PTHs from 1-8 are optional.If not required, outer layers can contain only surf ace mount padsAll vias must exit to pads, so 2-7 holes must have pads on 2 and 7
6
7
8
PTHs from 1-8 are optional.If not required, outer layers can contain only surf ace mount padsAll vias must exit to pads, so 2-7 holes must have pads on 2 and 7
PTH Blind vias 1-4, 5-8Layer
1
2
3
4
5
Blind sequential bond
5
6
7
8
"Double multilayer" with blind holes filling and pl ating overAll vias must exit to pads, so 1-4 and 5-8 holes mu st have pads on 4 and 5
Double laser blind sequential (2 bonds):
Buried PTH Laser drilled blind holes 1-2, 2-3, 6-7, 7-8
Layer
1
2
3
4
5
6
7
8
D o u b l e l a s e r b l in d s e q u e n t ia l
Buried PTH Laser drilled blind holes 1-2, 2-3, 6-7, 7-8
Layer
1
2
3
4
Buried PTH Laser drilled blind holes 1-2, 2-3, 6-7, 7-8
Layer
1
2
3
4
Double laser blind sequential (3 bonds)
4
5
6
7
8
Etc………
5
6
7
8
Etc………
1 ) L a min a t e a s s u p p l ie d b y ma n u f a c t u r e r
CopperFR4Copper
How a PCB is made…..
2 ) C o a t l a min a t e w i t h p h o t o r e s is t
PhotoresistCopperFR4CopperPhotoresist
3 ) P in t o o l e d n e g a t iv e in n e r l a y e r f i l mFilm
PhotoresistCopperFR4CopperPhotoresist
Film
What is clear will end up copper e.g. pads and tracks
4 ) Ex p o s e w i t h U V l ig h t
Film
PhotoresistCopperFR4CopperPhotoresist
Film
5 ) R e mo v e f i l m a n d d e v e l o po f f u n e x p o s e d r e s is t
PhotoresistCopperFR4CopperPhotoresist
6 ) E t c h o f f c o p p e r n o t p r o t e c t e d b y r e s is t
PhotoresistCopperFR4CopperPhotoresist
7 ) S t r ip o f f p h o t o r e s is t
CopperFR4Copper
….. to get an etched inner layer pair e.g. layers 2/3
8 ) B o n d l a y e r s t o f o r m 6 l a y e r b o a r dCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6
Full copper foil on outer layers
9) Drill and Permanganate DesmearCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6
1 0 ) D i r e c t me t a l is a t io n p r o c e s sCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6
Conductive graphite added (only remains on non copper)
1 1 ) C o a t w i t h p h o t o r e s is t
PhotoresistCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Photoresist
1 2 ) P in t o o l e d p o s i t i v e o u t e r l a y e r f i l m
Film
PhotoresistCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Photoresist
FilmWhat is black will end up copper e.g. pads and tracks
1 3 ) Ex p o s e w i t h U V l ig h t
Film
PhotoresistCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Photoresist
Film
1 4 ) R e mo v e f i l m a n d d e v e l o po f f u n e x p o s e d r e s is t
PhotoresistCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Photoresist
1 5 ) E l e c t r o p l a t e c o p p e r a n d t inPlated tin
Plated copperCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Plated copper
Plated tin
1 6 ) S t r ip o f f p h o t o r e s is t
Plated copperCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Plated copper
1 7 ) E t c h a w a y c o p p e r n o t p r o t e c t e d b y t in
Plated copperCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Plated copper
1 8 ) S t r ip t in
Plated copperCopper foil 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper foil 6Plated copper
….. and we have a working PCB!
1 9 ) C o a t w i t h s o l d e r r e s is t
Solder resistCopper 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper 6Solder resist
2 0 ) P in t o o l e d p o s i t iv e s o l d e r r e s is t f i l mFilm
Solder resistCopper 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper 6Solder resist
Film
2 1 ) Ex p o s e w i t h U V l ig h t
Film
Solder resistCopper 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper 6Solder resist
Film
2 2 ) R e mo v e f i l m a n d d e v e l o po f f u n e x p o s e d r e s is t
Solder resistCopper 1
Pre-pregCopper 2LaminateCopper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper 6Solder resist
2 3 ) A d d f in is h (e .g . N i / A u ) t o e x p o s e d c o p p e rSurface mount pad
Nickel / Gold
Solder resist
Copper 1
Pre-pregCopper 2LaminateCopper 3Copper 3Pre-pregCopper 4LaminateCopper 5Pre-pregCopper 6
Solder resist
Leaded component pad / via
Thank you for the interest shown
� For further information please:
� Visit our website www.stevenagecircuits.co.uk
� Email:� Email:� [email protected]
� Phone:� 01438 751800 (Stevenage Circuits)
� 01763 248922 (Tru-Lon)