Rule of anti-static at ANSI ESD S20.20 for cover tape
The standard of anti-static function at ANSI ESD S20.20 for SMT(SMD)
A packaging plan shall be established to define packaging requirements, both inside and outside the EPA, per ANSI/ESD S541 or the contract, purchase order, drawing, or other documentation necessary to meet customer requirements. Test methods and test limits required for the various types of ESD protective packaging used by the Organization per ANSI/ESD S541 are summarized in Table 4. Packaging considered 'single use' shall be subjected to the same product qualification and shall meet the corresponding test method and test limit requirements of Table 4
Force-One's cover tape can fit ANSI/ESD STM11.11 or ANSI/ESD STM11.12 or ANSI/ESD STM11.13
Read About "PSA(cold seal) Cover Tape"
For the SMT machine, first you need using Tape and reel to packaging your component. And the format need following EIA Standard, like dimension, pulling strength, the hole of carrier tape.
How to Choose a Cover Tape for SMD, SMT?
Choosing the right carrier tape for your device is only half the battle. Selecting the proper cover tape is also important to protect components, minimize product loss, and ensure a smooth ride through the pick-and-place process.
Heat-activated adhesive (HAA) cover tapes are the most widely used in the electronic component industry. Historically, they have been the least expensive and most readily available cover tapes on the market and work well in many cases. In the taping process, a heated sealing shoe presses the tape onto the edges of the carrier tape on both sides of each device, sealing the cover tape to the carrier tape while leaving the component free from active adhesive. In the HAA taping process, time, heat, and pressure must be carefully controlled to achieve optimum adhesion.
Most component manufacturers are familiar with and comfortable using HAA cover tape. However, compared to some newer technologies, HAA tape may not be the optimal choice for certain applications. The HAA taping process is relatively slow. While that’s not generally a problem for bigger components, smaller components and more devices per inch of carrier tape can markedly slow the production line. Moreover, HAA cover tape peel force is relatively inconsistent compared to more advanced cover tapes (Figure 1). The peel force’s deep lows and high peaks can result in a relatively inconsistent de-taping force at the SMT assembly plant, potentially causing devices to pop out of their carrier tape pockets — known as trampolining — and slowing down production. HAA cover tape’s adhesive can also be affected by time, temperature, and humidity.
For smaller devices, a pressure-sensitive adhesive (PSA) cover tape may offer a better alternative to HAA tape. As the name implies, PSA tape adheres when pressure is applied; heat is not required to activate the cover tape.
PSA tapes are designed to provide a smoother peel force (Figure 2), minimizing trampolining and increasing production speed regularity. PSA adhesive are also less affected by time and weather conditions. Moreover, because heat is not required, PSA cuts down on energy costs at the component packing stage. The drawback to PSA tapes is that they leave a residue that can build up in SMT feeders over time. This can be mitigated through regular placement equipment cleaning and minor retrofits, which tape suppliers should be able to suggest.
How many kind are cover tapes of Heat Seal and Pressure sensitive>
◆Heat Activated Type (HAA)
1. Normal Type
2. Transparent Type
3. Conductive Type
Read More About "Heat Activated Cover Tape"◆Pressure Sensitive Adhesives Sensitive (PSAs)
1. Normal Type
2. Conductive Type
3. Heat-Resisting Type
Read More About "PSA Cover Tape"Want to know more, Welcome to Contact us
What kind size of cover tape need go with difference width carrier tape like 8 mm, 12 mm, 16 mm, and 24 mm...?
1. Carrier Tape of 8 mm has to be used with Cover tape of 5.4mm.
2. Carrier Tape of 12 mm has to be used with Cover tape of 9.3mm.
3. Carrier Tape of 16 mm has to be used with Cover tape of 13.3mm.
4. Carrier Tape of 24 mm has to be used with Cover tape of 21.3mm.
5. Carrier Tape of 32 mm has to be used with Cover tape of 25.5mm.
6. Carrier Tape of 44 mm has to be used with Cover tape of 37.5mm.
7. Carrier Tape of 56 mm has to be used with Cover tape of 49.5mm.
8. Carrier Tape of 72 mm has to be used with Cover tape of 65.5mm.
9. Carrier Tape of 88 mm has to be used with Cover tape of 81.3mm.
What difference about SMT, SMD, DIP?
SMT（SMT: surface Mount Technology）
SMD（SMD: surface Mount Device）
DIP（Dual In-line Package）
The history about SMT?
The full name of SMT and SMD are surface Mount Technology and Surface Mount Device. SMT means a technology about fix the device on the PCB(Printed Circuit Board). SMD means some kind of electronic components can apply Surface Mount Technology to fix the device on the PCB.
SMT improve the cell phone or other device can become smaller. In the beginning, electronic devices like cell phone were produced by THT, DIP. （THT, Through-Hole Technology）（DIP, Dual-In line Package). The electronic components were not produced very small, if using THT,DIP to fix on PCB. The electronic components size of THT,DIP are about 5mmx5mm. If using SMT , the electronic components size are about 0.4mmx0.2mm.
About peeling Strength from EIA Standard-D (wikipedia)
4.11 in EIA Standard-D:
The cover tape for each style and material of carrier tape shall have a total peel strength of from 0.1 N to 1.0 N (10 grams to 100 grams calibrated scale reading) for 8 mm carrier tapes and 0.1N to 1.3 N (10 grams to 130 grams calibrated scale reading) for 12 mm to 56 mm wide carrier tapes and from 0.1N to 1.5 N (10 grams to 150 grams calibrated scale reading) for 72 mm and wider carrier tapes. Peel is defined as the separation of the full width of the cover tape from the carrier tape or the removal of the center portion of the cover tape from the carrier tape to enable component removal from the cavity. The direction of pull shall be opposite the direction of carrier tape travel such that the cover tape makes an angle of between 165 and 180 degrees with the top of the carrier tape. The cover tape, shall be pulled with a velocity of 300 mm±10 mm/minute, relative to the carrier tape, during peeling, which results in the cover/carrier tape seal being separated at a rate of 150 mm/minute.
About Cover Tape for SMT SMD, How many kind of cover tape type
Cover tape still can call: tape and reel, tape reel, SMD package, semiconductor tape, reel to reel, SMD reels, reel to reel tape, tape and reel packaging, electric reel, tape & reel packaging , 2668 , 2698 , 2671A for semiconductor packaging, component packaging
Cover tape combine with carrier tape and use for package the semiconductor(IC) or Passive components seal electrical and electronic components, it have anti-static layers can anti-static(ESD) during packing, transport and storage. Both PSA and HAA cover tapes can be found in non-conductive and static-dissipative versions. Some cover tapes are termed anti-static which are usually perceived as being the same as static-dissipative cover tapes. Technically, anti-static refers to a material which does not generate a static charge when rubbed against a second material (triboelectric charging). Static dissipative refers to a material which can bleed off a charge through the mechanism which provides it’s surface resistivity.
When sealing an HAA cover tape, temperature refers to the indicated temperature of the sealing mechanism. Heat activated adhesives are dry to the touch at room temperature. The absence of any tackiness is the property that permits their ready handling under these conditions. Tackiness must be attained to get the adhesive to “stick” the cover tape to the carrier tape. To accomplish this, energy in the form of heat is used to “activate” the cover tape’s adhesive system. This activation is the process that raises the temperature of the adhesive until it achieves a level of tackiness which allows it to adhere to the carrier tape. But PSA cover tapes require different processing and handling than heat activated cover tapes and are generally considered to be easier to seal than their heat activated counterparts. The PSA adhesive is a synthetic adhesive formulated to remain tacky over a wide range of temperatures, including room temperature. Hence, PSA cover tapes require no heat to seal them to the carrier. To prevent components from sticking to the adhesive, a liner film is added to cover the adhesive in the center portion of the cover tape.
Force-One is a manufacturer of optical film in Taiwan. Our products of tape and reel have high quality, nice price can fit what you want. Our cover tape have more than 20 kinds for our customers, like: anti-static type, difference adhesive force, difference color, anti-high temperature. We can customized what you need, welcome to contact us.
Force-One's cover tape have very stable peeling strength for PS or PC carrier tape as below.
antistatic PSA Cover Tape (Normal Type)
Width: 5.4mm, 9.3mm, 13.3mm, 21.3mm, 25.5mm, 37.5mm, 49.5mm, 65.5mm, 81.5mm
The Benefits：
1.PET with Pressure Sensitive Adhesives combined with brown or Transparent anti-static film.
2.Excellent and stable quality . The aging (60℃ / 720hrs) and peeling force test had passed.
3.The value of anti-static is 10^9~11, It can prevent ESD issue.
4.Excellent sealing. Can meet any carrier tape of PC, PS, PET to seal.
5.Thickness: 60 ± 5 um. Can anti high temperatures before vacuum packaging ( 80℃) without peeling issue.
PSA Cover Tape(Heat-Resisting Type)
The Benefits：
1.PET with Pressure Sensitive Adhesives combined with brown or Transparent anti-static film.
2.Excellent and stable quality . The aging (60℃ / 720hrs) and peeling force test had passed.
3.The value of anti-static is 10^9~10^11, Adhesive is 10^8~10 It can prevent ESD issue.
4.Excellent sealing. Can meet any carrier tape of PC, PS, PET to seal.
5.Thickness: 60 ± 5 um. Can anti high temperatures before vacuum packaging (120℃) without peeling issue.
Want to know more, Welcome to Contact us
Read About "Sealing Heat Cover Tape"
>Cutting Line:
===The Introduction of Force-One's Cover Tape===
Force-One's is uniquely designed to peel through the film itself and available as static dissipative.The cover tapes for semiconductor(IC) or Passive components seal electrical and electronic components into Carrier Tapes, it have anti-static layers can anti-static(ESD) during packing, transport and storage. The cover tapes for semiconductor could combine excellent sealing properties with smooth peel force to protect IC or Passive components and permit efficient pick-and-place operations. The full line of Force-One's Cover Tapes includes conductive, non-conductive and static dissipative products with heat activated or pressure-sensitive adhesive.
Both PSA and HAA cover tapes can be found in non-conductive and static-dissipative versions. Some cover tapes are termed anti-static which are usually perceived as being the same as static-dissipative cover tapes. Technically, anti-static refers to a material which does not generate a static charge when rubbed against a second material (triboelectric charging). Static dissipative refers to a material which can bleed off a charge through the mechanism which provides it’s surface resistivity. A non-conductive material is defined as having a surface resistivity (Rs) greater than 10^12 ohms/square. Static dissipative material is defined as having a surface resistivity (Rs) between 10^5 ohms/square and 10^12 ohms/square. While conductive material is defined as having a surface resistivity (Rs) of less than 10^5 ohms/square.
The cover tapes(Tape & Reel) for semiconductor(IC) or Passive components is good for SMD/SMT(Surface-Mount Device / Surface-Mount Technology) process. And can anti-static cover tape for packaging of surface mount devices (ESD protection).
Common TDS: Thin:0.05~0.06 mm ; Transmittance: 60%~89% ; Haze: 3%~30% ; Anti-static: ≦10^9-11Ω/sq ; Working temperature:140℃ - 190℃ ; RA pass:55℃~60℃/720 hrs
Width: 5.4mm, 9.3mm, 13.3mm, 21.3mm, 25.5mm, 37.5mm, 49.5mm, 65.5mm, 81.5mm
◆Heat Activated Type (HAA)
1. Normal Type
2. Transparent Type
3. Conductive Type
Read More About "Heat Activated Cover Tape"◆Pressure Sensitive Adhesives Sensitive (PSAs)
1. Normal Type
2. Conductive Type
3. Heat-Resisting Type
Read More About "PSA Cover Tape"Want to know more, Welcome to Contact us
*****Sealing Heat Activated Cover Tape*****
For any heat-activated adhesive cover tape, as a general rule,increasing temperature, dwell time, and pressure on a given sealing machine will, within limits, increase adhesion (peel). However, for most of the HAA cover tapes available in the marketplace today, temperature and dwell will have a greater affect on adhesion than pressure. The ways these variables interact in the sealing process are of interest to anyone trying to control a packaging process.
>Normal Type Cover Tape
Similar as Common TDS
>Transparent Type Cover Tape
Special TDS: Transmittance: 89%
>Conductive Type Cover Tape
Special TDS: PET's anti-static: ≦10^5-10Ω/sq ; Adhesive anti-static: ≦10^9Ω/sq
*****Pressure Sensitive Adhesives Cover Tape*****
PSA cover tapes require different processing and handling than heat activated cover tapes and are generally considered to be easier to seal than their heat activated counterparts. The PSA adhesive is a synthetic adhesive formulated to remain tacky over a wide range of temperatures, including room temperature. Hence, PSA cover tapes require no heat to seal them to the carrier. To prevent components from sticking to the adhesive, a liner film is added to cover the adhesive in the center portion of the cover tape. PSA cover tapes are slightly more complex in their cons
>Normal Type-Cover Tape
Similar as Common TDS
>Conductive Type Cover Tape
Special TDS: Adhesive anti-static:≦10^3-5Ω/sq
>Heat-Resisting Type Cover Tape
Special TDS: Can Heat-Resisting: 125℃/8hr or 50℃/24hr
Want to know more, Welcome to Contact us
==========================
About Cover Tape
Cover tape still can call: tape and reel, tape reel, SMD package, semiconductor tape, reel to reel, SMD reels, reel to reel tape, tape and reel packaging, electric reel, tape & reel packaging , 2668 , 2698 , 2671A for semiconductor packaging, component packaging
Cover tape combine with carrier tape and use for package the semiconductor(IC) or Passive components seal electrical and electronic components, it have anti-static layers can anti-static(ESD) during packing, transport and storage. Both PSA and HAA cover tapes can be found in non-conductive and static-dissipative versions. Some cover tapes are termed anti-static which are usually perceived as being the same as static-dissipative cover tapes. Technically, anti-static refers to a material which does not generate a static charge when rubbed against a second material (triboelectric charging). Static dissipative refers to a material which can bleed off a charge through the mechanism which provides it’s surface resistivity.
When sealing an HAA cover tape, temperature refers to the indicated temperature of the sealing mechanism. Heat activated adhesives are dry to the touch at room temperature. The absence of any tackiness is the property that permits their ready handling under these conditions. Tackiness must be attained to get the adhesive to “stick” the cover tape to the carrier tape. To accomplish this, energy in the form of heat is used to “activate” the cover tape’s adhesive system. This activation is the process that raises the temperature of the adhesive until it achieves a level of tackiness which allows it to adhere to the carrier tape. But PSA cover tapes require different processing and handling than heat activated cover tapes and are generally considered to be easier to seal than their heat activated counterparts. The PSA adhesive is a synthetic adhesive formulated to remain tacky over a wide range of temperatures, including room temperature. Hence, PSA cover tapes require no heat to seal them to the carrier. To prevent components from sticking to the adhesive, a liner film is added to cover the adhesive in the center portion of the cover tape.
REFERENCES:FUNDAMENTALS OF PSA AND HEAT ACTIVATED COVER TAPE SEALING FOR COMPONENTS PACKAGED IN TAPE AND REEL
2668 , 2698 , 2671A
About Force-One
Force-One Applied Materials CO., LTD. is a professional optical film manufacturer. And have know how of formulas. We can meet difference specifications for every customer with high quality. Our customers are all over the world include America ,India , China ,Taiwan , Malaysia , Philippines, Singapore, Thailand, Vietnam, Indonesia.
