Lead-free FR-4 Specs: facts and fiction: Just in time for July 1, what you need to know about IPC-4101B--what it does and what it doesn't do.NOT SINCE THE 1997 cancellation of MIL-S-13949H has the electronics industry been in such a fervor about a base material specification. Remember the proclamations? No MIL-SPEC MIL-SPEC Military Specification ! No QPL QPL Q Public License QPL Qualified Products List QPL Qualified Parts List QPL Quantum Programming Language QPL Questionnaire Programming Language QPL Qualified Product Listing QPL Quality Products List QPL Quality Parts List QPL Qt Public License ! IPC-4101 is the replacement! Planes will fall from the sky and mankind MANKIND. Persons of the male sex; but in a more general sense, it includes persons of both sexes; for example, the statute of 25 Hen. VIII., c. 6, makes it felony to commit, sodomy with mankind or beast. Females as well as males axe included under the term mankind. Fortesc. 91; Bac. Ab. will cease to exist! However, the predicted apocalypse apocalypse (əpŏk`əlĭps) [Gr.,=uncovering], genre represented in early Jewish and in Christian literature in which the secrets of the heavenly world or of the world to come are revealed by angelic mediation within a narrative did not take place. IPC-4101 became the base materials standard for the U.S. and much of the world as well. IPC-4101 and its subsequent revision, IPC-4101A, represent one of the most widely used IPC (1) (InterProcess Communication) The exchange of data between one program and another either within the same computer or over a network. It implies a protocol that guarantees a response to a request. documents. But whereas the "A" revision was written and implemented as an evolutionary sequel to the original, IPC-4101B has become a lightning rod lightning rod, a rod made of materials, especially metals, that are good conductors of electricity, which is mounted on top of a building or other structure and attached to the ground by a cable. for attention. The proposed "B" revision of IPC4101, Specification for Base Materials for Rigid and Multilayer Printed Boards, contains new specification sheets describing FR-4 base materials that are compatible with lead-free adj. 1. not containing the element lead. 2. Not containing a lead additive such as tetraethyllead or tetramethyllead; - of gasoline; as, Most modern cars run on lead-free gasoline s>. Oposite of leaded nt>. 3. assembly. These specification sheets also outline qualification and periodic conformance con·for·mance n. Conformity. Noun 1. conformance - correspondence in form or appearance conformity agreement, correspondence - compatibility of observations; "there was no agreement between theory and requirements not found currently for FR-4 base materials, including Td, T260, T288, T300 and Z-axis The third dimension in a graphics image. The width is the x-axis and the height is the y-axis. expansion. These specification sheets are listed here along with some descriptive information: IPC-41018/99. High Tg FR-4, inorganic inorganic /in·or·gan·ic/ (in?or-gan´ik) 1. having no organs. 2. not of organic origin. in·or·gan·ic n. 1. fillers, brominated flame retardant Brominated flame retardants are produced synthetically in 70 variants with very varying chemical properties. There are several groups:
IPC-4101 B/101, Low Tg FR-4, inorganic fillers, brominated flame retardant IPC-4101 B/121, Low Tg FR-4, no fillers, brominated flame retardant IPC-4101B/124, High Tg FR-4, no fillers, brominated flame retardant IPC-41018/126. Very high Tg, inorganic fillers, brominated flame retardant IPC-4101B/129. Very high Tg, no fillers, brominated flame retardant Fact: Keywords Keywords are the words that are used to reveal the internal structure of an author's reasoning. While they are used primarily for rhetoric, they are also used in a strictly grammatical sense for structural composition, reasoning, and comprehension. will be part of the document. IPC-4101B has been expanded significantly in terms of the base material grades covered, especially in the generic family called FR-4. The original 1997 version of IPC-4101 had 30 specification sheets and IPC-4101B now has 55. The organizational structure  This article has no lead section.To comply with Wikipedia's lead section guidelines, one should be written. developed in the 1990s has been overwhelmed o·ver·whelm tr.v. o·ver·whelmed, o·ver·whelm·ing, o·ver·whelms 1. To surge over and submerge; engulf: waves overwhelming the rocky shoreline. 2. a. by the inclusion of new materials over the past nine years. For example, the 20 series specification numbers (i.e., 20, 21, 22 and so forth) were designated for FR-4 materials. When specification sheet number 29 was reached, FR-4 materials spilled over into the 90 series and then the 100 series numbers. In order to help users more easily find materials suited to their needs, keywords have been developed for each of the 55 specification sheets in IPC-4101B. The intention was to provide the typical composition, application, performance characteristics and market for each base material. In the electronic copies of IPC-4101B, the user will be able to conduct a search for the specification sheets by a specific keyword (1) A word used in a text search. (2) A word in a text document that is used in an index to best describe the contents of the document. (3) A reserved word in a programming or command language. 1. . For example, typing in the term "lead-free FR-4" will list specification sheet numbers 99, 101, 121, 124, 126 and 129. Fiction: Keywords are requirements, Keywords will provide the user with an easy reference as to the "normal" use of a base material grade. A lot of the angst angst 1 n. A feeling of anxiety or apprehension often accompanied by depression. angst 2 abbr. angstrom concerning keywords is that they are perceived per·ceive tr.v. per·ceived, per·ceiv·ing, per·ceives 1. To become aware of directly through any of the senses, especially sight or hearing. 2. To achieve understanding of; apprehend. to be part of the requirements for each specification sheet number. The keywords are not requirements; they are simply information. Currently each specification sheet also has the following instruction above the keywords section in the header (1) In a disk or tape file, a set of data that resides permanently at the beginning. It may be used for identification only (type of file, date of last update, etc.), or it may describe the structural layout of the contents, as is common with many document and database formats. : Keywords: (For Search Only) NOT Grade Requirements See Section 7 Fiction: Keywords guarantee performance. The following can be found at the front of each IPC standard: IPC Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with a minimum delay the proper product for his particular need. There is no guarantee of performance. Did materials certified See certification. to MIL-S-13949H provide a guarantee of performance of a radar system in an F-16? Many different factors beyond the control of the standard can influence the ability to manufacture a functional board, assembly or electronic part. The best that can be said is that materials certified to an IPC standard, or any other standard for that matter, have the best probability of success. Fiction: Keywords restrict material use. The main message of the keywords is "typical use." Typical use does not mean "the only use." The keyword "single-sided single-sided adj (COMPUT) [disk] → de una cara " may appear next to CEM-1, but that does not mean it can't be used for double-sided boards with a plated through-hole if someone can do it. It simply means the typical use is single-sided boards. In addition, applications are not limited to the specification sheets with that specific keyword. For example, there are six specification sheets with the keyword "lead-free FR-4." Can other FR-4 materials be used for lead-free assembly? Yes. Can base materials other than FR-4 be used for lead-free assembly? Yes. IPC has always endorsed a "fitness for use" philosophy when it comes to base materials for specific applications. The list of keywords by specification sheet number is shown in TABLE 1. Section 7 of IPC-4101B clearly discusses the intent of these keywords. Several examples have been presented to clarify the use of keywords as intended by the IPC Laminate laminate, n a thin slice of porcelain or plastic fabricated in a dental lab, which is cemented to the front of the teeth to cover gaps, whiten stained teeth, or reshape chipped or broken teeth. and Prepreg Subcommittee sub·com·mit·tee n. A subordinate committee composed of members appointed from a main committee. subcommittee Noun members who prepared this document. Most of the concerns about IPC-4101B and the use of the keywords are fiction. Suppliers and customers alike must utilize education and communication to use this or any other IPC standard with the intent of the subcommittee authors. DOUG SOBER is a marketing specialist for Kaneka Texas Corp., a member of the IPC Raymond Raymond, town, Canada Raymond, town (1991 pop. 3,130), S Alta., Canada, SE of Lethbridge, in a sugar beet area. Sugar is refined and honey is produced there. A provincial agricultural college is in the town. E. Pritchard Pritchard can refer to:
TABLE 1. Segmented Keyword Search Terms and All Specification Sheets
That Use The Specific Keywords for Searching
ALL APPROPRIATE
MATERIAL COMPOSITION KEYWORDS SPECIFICATION SHEETS
BT / Epoxy / Woven Glass /30
Cyanate Ester/ Woven Aramid /54
Cyanate Ester/ Woven Glass /71
Cyanate Ester/ Woven S-2 Glass /70
Epoxy / Cyanate Ester / Woven Glass /29
Epoxy / Non-Epoxy / Nonwoven Aramid /58
Epoxy / Non-Epoxy / Woven Glass /28
Epoxy / Nonwoven Aramid /55,/57
Epoxy / Paper /04
Epoxy / PPO / Woven Glass /25
Epoxy / Woven Aramid /50
Epoxy / Woven Glass /20,/21,/22,/23,/24,/26,/27,/82,
/83,/92,/93,/94,/95,/97,/98,/99,
/101,/121,/124,/126,/129
Epoxy / Woven Glass / Nonwoven
Glass /12,/81
Epoxy / Woven Glass / Paper /10,/80
Phenolic / Paper /00,/01,/02,/03,/05
Polyester/ Glass /13
Polyester/ Woven Glass / Nonwoven
Glass /11
Polyimide / Epoxy / Woven Glass /42
Polyimide / Nonwoven Aramid /56
Polyimide / Woven Glass /40,/41
Polyimide / Woven Quartz /60
PPE /Woven Glass /90,/91,/96
ALL APPROPRIATE
DESCRIPTION OR APPLICATION KEYWORDS SPECIFICATION SHEETS
Additive / Semi-Additive /80,/81,/82,/83
Composite /10,/11,/12,/14
Consumer Electronics /00,/01,/02,/03,/04,/05,/10,/11,
/12,/14,/80,/81,/82,/83
Crossplied Unidirectional /27,/54
Double-Sided /12,/14,/81
Heatsink Application /31,/32,/33
Lead-Free FR-4 /99,/101,/121,/124,/126,/129
Microvia /53,/55,/56,/57,/58
Non-Reinforced Film /31,/33
Punchable /00,/01,/02,/03,/04,/05,/10,/11,
/12,/14,/80,/81
Single-Sided /00,/01,/02,/03,/04,/05,/10,/11,
/80
ALL APPROPRIATE
ANSI OR MILITARY KEYWORDS SPECIFICATION SHEETS
CEM-1 /10,/80
CEM-3 /12,/14,/81
CRM-5 /11
FR-1 /02
FR-2 /03,/05
FR-3 /04
FR-4 /21,/24,/26,/27,/82,/83,/92,/93,
/94,/95,/97,/98
FR-5 /23
G-10 /20
G-11 /22
XPC /00
XXXPC /01
GFN /21,/24,/97,/98
GFT /26,/28
GPY /30,/40,/41,/42
ALL APPROPRIATE
MATERIAL PROPERTY KEYWORDS SPECIFICATION SHEETS
CAF Resistance /29,/30,/70,/71,/126
High Decomposition Temperature /99,/124,/126,/129
High Reliability /40,/41,/42
Hot Flex Strength /22,/23
Low Dk / Df /13,/25,/50,/53,/54,/55,/56,/57,
/58,/70,/71,/90,/91,/96
Low Halogen Content /05,/14,/57,/58,/92,/93,/94,/95,
/96
Low X / Y CTE /50,/53,/54,/55,/56,/57,/58,/60,
/70
Low Z-axis CTE /99,/101,/121,/124,/126,/129
Non-Flame Retardant /20,/22
Thermally Conductive /31,/32,/33
ALL APPROPRIATE
MATERIAL MODIFIER KEYWORDS SPECIFICATION SHEETS
Fillers /97,/98
Multifunctional Epoxy /24,/55,/57,/83,/94,/95,/98
|
|
||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion