The Stacked CSP (SCSP) family leverages Amkor's industry leading ChipArray® Ball Grid Array (CABGA) manufacturing capabilities. This broad high volume infrastructure enables the rapid deployment of advances in die stacking technology across multiple products and factories to achieve lowest total cost requirements.

Stacked CSP technology enables the stacking of a wide range of different semiconductor devices to deliver the high level of silicon integration and area efficiency required in portable multi-media products.

Stacked CSP utilizes high density thin core substrates, advanced materials (ie: thin film die attach adhesive, fine filler epoxy mold compound), along with leading-edge wafer thinning, die attach, wire bonding and molding capabilities to stack multiple devices in a conventional fine pitch BGA (FBGA) surface mount component. These advanced assembly capabilities in combination with Amkor's expertise in design and test, enable stacks up to 16 active devices while optimizing yield and mounted height requirements.

Many customers have relied on Amkor to solve their highest density and most complex device stack combinations. As a result, Amkor has established industry leadership in stacking pure memory, mixed signal, and logic + memory devices, including NAND, NOR and DRAM memory, digital base band or applications processors + high density flash or mobile DRAM devices. Designers are looking to Stacked CSP technologies to achieve a high level of integration, along with size and cost reductions in future chip set combinations.

Stacked CSP Applications:

Portable multi-media devices including cell phones, digital cameras, PDAs, audio players and mobile gaming employ SCSP solutions to address a range of design requirements, including:

  • StackedCSPHigher memory capacity and more efficient memory architectures
  • Smaller, lighter and more innovative new product form factors
  • Lower cost and more space efficient 


Stacked CSP Features:

  • 2 - 21 mm body size
  • Package height down to 0.6 mm
  • High die count pure memory, eMMC eMCP and MCP
  • Design, assembly and test capabilities that enable stacking of DRAM with Logic or Flash memory devices
  • Logic / Flash, Digital / Analog and other ASIC / Memory combinations of 320 I/O and greater
  • Established package infrastructure with standard CABGA footprints
  • Consistent product performance, high yields and reliability
  • JEDEC Standard Outlines including MO-192 and MO-219
  • Thin DA film and spacer technology, FoW and FoD
  • Extended die overhang wire bonding
  • Low loop wire bonding less than 45 µm
  • Wafer thinning / wafer handling to 30 µm
  • Vacuum transfer and compression molding
  • Pb free, RoHS compliant and Green materials
  • Passive component integration options


Stacked CSP Reliability Qualification:

Amkor assures a reliable performance by continuously monitoring key indices:

Package Level Reliability:

Moisture Resistance Testing:   JEDEC Level 3 @ 260°C
Additional Test Data at:   [ (30°C / 85% RH / 96hrs) + 260 ] x2 or 3
Unbiased Autoclave/PCT:   121°C / 100% RH / 2atm, 168 hours
Temp / Humidity:   85°C / 85% RH / 1000 hours
High temp storage:   150°C, 1000 hours
Temp cycle:   -55 / +125°C, 1000 cycles

Board Level Reliabiltiy:

Thermal cycle:   -40 / +125°C, 1000 cycles

Stacked CSP Process Highlights:

Process Highlights:

Die qty, stack:   Up to 16 high die configurations
Ball pad pitch:   0.3, 0.4, 0.5, 0.65, 0.75, 0.8 mm
Die thickness (min):   Down to 30 µm
Laminate core thickness:   40, 50, 60, 100 or 150 µm
Ball diameter:  0.25, 0.30, 0.40, 0.46 mm
Die bond pitch (min):   40 µm (In-line) with roadmap to 25 µm
Wirebond length (max):   5 mm (200 mils)
Low loop wirebonding:  45 µm
Wirebond dia (min):   15, 18, 20, 25, 30 µm
Wafer thinning:   200 & 300 mm wafers

Standard Materials:

Package Substrate 
  - Layer count (Laminate):   2-6
  - Dielectric:  Laminate (e.g., DS7409, E679, BT),  Polyimide (e.g., Kapton®)
Device type:   Silicon, SiGe, etc.
Die attach  Film DA compatible with all passivation types
Wire type:   Ag, Gold, Cu, PCC High tensile strength
Encapsulant:   Thixotropic Epoxy (Black)
Solderball:  63Sn / 37Pb & PbFree Sn/3-4Ag / 0.5Cu
Marking:  Laser

Contact Amkor for Daisy chain sample availability and the latest SCSP capabilities.


 Stacked CSP Cross Sections:

stacked CSP cross section 1




stacked CSP cross section 3
stacked CSP cross section 2



Stacked CSP Cross Section 16+0 Die

For more information on our Stacked CSP (SCSP) package, please contact an Amkor Regional Sales Office near you or fill out the Request Form.


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